SCHEMA epicentre;
REFERENCE FROM epicentre_extensions;

ENTITY activity
 ABSTRACT SUPERTYPE OF (ONEOF(
  analytical_reservoir_analysis,
  choke_adjustment_event,
  compose_document_specification,
  contract_processing_operation,
  coordinate_transformation_activity,
  curve_fit_activity,
  digitize_document,
  directional_survey_analysis,
  document_circulation,
  equipment_calibration,
  equipment_repair_job,
  flow_system_analysis,
  geoscience_interpretation,
  incident_investigation,
  incident_of_noncompliance,
  lift_system_analysis,
  log_trace_analysis,
  materials_balance_analysis,
  materials_characterization,
  materials_processing,
  other_activity,
  positioning_measurement_activity,
  process_application_for_permit,
  production_activity,
  render_document,
  reserves_category_change,
  reserves_evaluation,
  reservoir_simulation,
  reservoir_simulation_case,
  reservoir_simulation_preprocessing,
  reservoir_simulation_postprocessing,
  reservoir_simulation_time_step,
  sample_acquisition,
  seismic_acquisition_activity,
  seismic_processing_activity,
  surface_geologic_survey,
  valve_close_event,
  valve_open_event,
  well_activity,
  well_completion_activity,
  well_pattern_analysis,
  well_test_analysis,
  well_test_measurement,
  wellbore_activity
 ))
 SUBTYPE OF (
  e_and_p_data
 );
 cost : OPTIONAL ndt_money ;
 description : OPTIONAL ndt_comment ;
 duration : OPTIONAL ndt_time ;
 end_time : OPTIONAL ndt_date_tod ;
 name : OPTIONAL ndt_name ;
 ref_existence_kind : ref_existence_kind ;
 start_time : OPTIONAL ndt_date_tod ;
 typical_activity : OPTIONAL typical_activity ;
 utilize_equipment : OPTIONAL equipment_item ;
 facility : OPTIONAL SET[0:?] OF facility ;
 containing_activity : OPTIONAL activity ;
 ref_transient_period : OPTIONAL ref_transient_period ;
 utilize_material : OPTIONAL SET[0:?] OF material ;
INVERSE
 contract : SET[0:?] OF contract FOR activity ;
 business_associate_activity_role : SET[0:?] OF business_associate_activity_role FOR activity ;
 describing_schedule : SET[0:?] OF schedule FOR described_activity ;
 schedule_activity : SET[0:?] OF schedule_activity FOR activity ;
 constrained_by : SET[0:?] OF schedule_constraint FOR constraint_for ;
 guideline_or_privilege_compliance : SET[0:?] OF guideline_or_privilege_compliance FOR activity ;
 cause_association : SET[0:?] OF transient_association FOR caused_by ;
 activity_classification : SET[0:?] OF activity_classification FOR activity ;
 constraint_for : SET[0:?] OF schedule_constraint FOR constrained_by ;
 contained_activity : SET[0:?] OF activity FOR containing_activity ;
 create_schedule : SET[0:?] OF schedule FOR create_activity ;
 fulfill : SET[0:?] OF activity_fulfillment FOR fulfillment ;
 fulfillment : SET[0:?] OF activity_fulfillment FOR fulfill ;
 populate : SET[0:?] OF data_collection FOR populated_by ;
 process_data : SET[0:?] OF process_data FOR activity ;
 contractual_obligation : SET[0:?] OF contractual_obligation FOR contractual_obligation_activity ;
 terminate_association : SET[0:?] OF transient_association FOR terminated_by ;
 update_collection : SET[0:?] OF data_collection FOR updated_by ;
 process_data_item : SET[0:?] OF process_data_item FOR activity ;
 result_of : BAG[0:1] OF activity_cause_and_effect FOR result ;
 caused : SET[0:?] OF activity_cause_and_effect FOR caused_by ;
 guideline_or_privilege : SET[0:?] OF guideline_or_privilege FOR activity_subject_to_guideline ;
WHERE
  dri1 : not (self in containing_activity);
  dri2 : not (self in contained_activity);
  val1 : (ref_transient_period.name = 'event' ) and (
    not (exists (start_time) and not exists (end_time) )
    or start_time = end_time )
    ;
  val2 : (ref_transient_period.name = 'year to date') or
    (ref_transient_period.name = 'month to date') or
    (ref_transient_period.name = 'cumulative')
    and not exists (end_time);
  val3 : (ref_transient_period.name = 'annual') or
    (ref_transient_period.name = 'semiannual') or
    (ref_transient_period.name = 'quarter') or
    (ref_transient_period.name = 'monthly') or
    (ref_transient_period.name = 'daily') or
    (ref_transient_period.name = 'hourly') and
    not (exists (start_time) and not exists (end_time) )
    ;
END_ENTITY;

ENTITY activity_cause_and_effect
 SUBTYPE OF (
  association
 );
 caused_by : activity ;
 result : activity ;
 intentional : OPTIONAL ndt_boolean ;
 description : OPTIONAL ndt_comment ;
UNIQUE
 si: caused_by,
     result;
END_ENTITY;

ENTITY activity_class
 SUBTYPE OF (
  classification_class
 );
INVERSE
 be_a_member_of : SET[0:?] OF activity_class_classification FOR have_as_a_member ;
 classify : SET[0:?] OF activity_class_classification FOR be_classified_as ;
 activity_classification : SET[0:?] OF activity_classification FOR activity_class ;
 typical_activity_classification : SET[0:?] OF typical_activity_classification FOR activity_class ;
 activity_class_alias : SET[0:?] OF activity_class_alias FOR activity_class ;
UNIQUE
 si: name,
     classification_system;
END_ENTITY;

ENTITY activity_class_alias
 SUBTYPE OF (
  reference_behavior,
  technical_object
 );
 activity_class : activity_class ;
 classification_system : classification_system ;
 name : ndt_long_name ;
UNIQUE
 si: classification_system,
     name,
     activity_class;
END_ENTITY;

ENTITY activity_class_classification
 SUBTYPE OF (
  reference_behavior,
  transient_association
 );
 be_classified_as : activity_class ;
 have_as_a_member : activity_class ;
UNIQUE
 si: end_time,
     start_time,
     be_classified_as,
     have_as_a_member;
END_ENTITY;

ENTITY activity_classification
 SUBTYPE OF (
  transient_association
 );
 activity_class : activity_class ;
 activity : activity ;
UNIQUE
 si: end_time,
     start_time,
     activity_class,
     activity;
END_ENTITY;

ENTITY activity_fulfillment
 SUBTYPE OF (
  association
 );
 fulfillment : activity ;
 fulfill : activity ;
 relative_time : OPTIONAL ndt_time ;
UNIQUE
 si: fulfillment,
     fulfill;
END_ENTITY;

ENTITY activity_template
 SUBTYPE OF (
  reference_behavior,
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 name : ndt_name ;
 contained_activity : OPTIONAL SET[0:?] OF typical_activity ;
 described_activity : typical_activity ;
INVERSE
 activity_template_constraint : SET[0:?] OF activity_template_constraint FOR activity_template ;
UNIQUE
 si: name,
     described_activity;
END_ENTITY;

ENTITY activity_template_constraint
 SUBTYPE OF (
  association
 );
 activity_duration : OPTIONAL ndt_day_interval ;
 description : OPTIONAL ndt_comment ;
 ref_template_constraint_kind : ref_template_constraint_kind ;
 relative_time : OPTIONAL ndt_day_interval ;
 activity_template : activity_template ;
 constrained_by : OPTIONAL typical_activity ;
 constraint_for : typical_activity ;
UNIQUE
 si: ref_template_constraint_kind,
     activity_template,
     constrained_by,
     constraint_for;
END_ENTITY;

ENTITY address
 ABSTRACT SUPERTYPE OF (ONEOF(
  email_address,
  mailing_address,
  phone_number,
  physical_address
 ))
 SUBTYPE OF (
  business_object
 );
 description : OPTIONAL ndt_comment ;
 effective_date : OPTIONAL ndt_date ;
 expiry_date : OPTIONAL ndt_date ;
 business_associate : OPTIONAL business_associate ;
 ref_address_qualifier : OPTIONAL ref_address_qualifier ;
 facility : OPTIONAL facility ;
INVERSE
 contract_designation : SET[0:?] OF contract_designation FOR address ;
WHERE
  val1 : exists (business_associate) or exists (facility);
END_ENTITY;

ENTITY aircraft
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     identifying_facility,
     ref_existence_kind;
END_ENTITY;

ENTITY allocated_flow_stream
 SUBTYPE OF (
  fluid_flow_stream
 );
 fluid_component : fluid_component ;
INVERSE
 pty_standard_volume_gas : SET[0:?] OF pty_standard_volume_gas FOR allocated_flow_stream ;
 pty_basic_sediment_and_water : SET[0:?] OF pty_basic_sediment_and_water FOR allocated_flow_stream ;
 pty_fluid_component_ratio : SET[0:?] OF pty_fluid_component_ratio FOR allocated_flow_stream ;
 pty_standard_volume_gas_rate : SET[0:?] OF pty_standard_volume_gas_rate FOR allocated_flow_stream ;
 pty_standard_volume_liquid : SET[0:?] OF pty_standard_volume_liquid FOR allocated_flow_stream ;
 pty_standard_volume_liquid_rate : SET[0:?] OF pty_standard_volume_liquid_rate FOR allocated_flow_stream ;
 pty_transient_calorific_value_gas : SET[0:?] OF pty_transient_calorific_value_gas FOR allocated_flow_stream ;
 pty_transient_density_liquid : SET[0:?] OF pty_transient_density_liquid FOR allocated_flow_stream ;
 pty_transient_density_vapor : SET[0:?] OF pty_transient_density_vapor FOR allocated_flow_stream ;
 pty_transient_mass : SET[0:?] OF pty_transient_mass FOR allocated_flow_stream ;
UNIQUE
 si: product_flow_network_unit_port,
     fluid_component;
END_ENTITY;

ENTITY allowable_flow_stream
 SUBTYPE OF (
  fluid_flow_stream
 );
 ref_allowable : ref_allowable ;
 fluid_component : fluid_component ;
INVERSE
 pty_fluid_component_ratio : SET[0:?] OF pty_fluid_component_ratio FOR allowable_flow_stream ;
 pty_standard_volume_gas : SET[0:?] OF pty_standard_volume_gas FOR allowable_flow_stream ;
 pty_standard_volume_liquid : SET[0:?] OF pty_standard_volume_liquid FOR allowable_flow_stream ;
 pty_transient_pressure : SET[0:?] OF pty_transient_pressure FOR allowable_flow_stream ;
UNIQUE
 si: ref_allowable,
     product_flow_network_unit_port,
     fluid_component;
END_ENTITY;

ENTITY analytical_reservoir_analysis
 SUBTYPE OF (
  activity
 );
 rock_fluid_feature : SET[1:?] OF rock_fluid_feature ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY anchor_winch
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     identifying_facility,
     ref_existence_kind;
END_ENTITY;

ENTITY anchoring_system
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     ref_existence_kind,
     identifying_facility;
END_ENTITY;

ENTITY application_for_permit
 SUBTYPE OF (
  document_specification
 );
 facility : OPTIONAL SET[0:?] OF facility ;
 applicant : business_associate ;
 permit_specification : OPTIONAL permit_specification ;
INVERSE
 general_land_right : SET[0:?] OF general_land_right FOR application_for_permit ;
 process_application_for_permit : SET[0:?] OF process_application_for_permit FOR application_for_permit ;
 application_status : SET[0:?] OF application_status FOR application_for_permit ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY application_status
 SUBTYPE OF (
  transient_association
 );
 ref_application_status : ref_application_status ;
 application_for_permit : application_for_permit ;
UNIQUE
 si: end_time,
     start_time,
     application_for_permit;
END_ENTITY;

ENTITY applied_coordinate_transformation
 SUBTYPE OF (
  association,
  reference_behavior
 );
 source_coordinate_system : coordinate_system ;
 target_coordinate_system : coordinate_system ;
 face : OPTIONAL face ;
 edge : OPTIONAL edge ;
 coordinate_transformation : coordinate_transformation ;
 description : OPTIONAL ndt_comment ;
INVERSE
 coordinate_transformation_activity : SET[0:?] OF coordinate_transformation_activity FOR applied_coordinate_transformation ;
UNIQUE
 si: source_coordinate_system,
     target_coordinate_system,
     coordinate_transformation;
WHERE
  ose : exists (edge) xor exists (face)
    xor not (exists (edge) or exists (face) );
  dri : target_coordinate_system:<>:source_coordinate_system;
END_ENTITY;

ENTITY aquifer
 SUBTYPE OF (
  rock_fluid_feature
 );
 name : ndt_identifier ;
INVERSE
 pty_aquifer_pressure_constant : SET[0:?] OF pty_aquifer_pressure_constant FOR aquifer ;
 pty_aquifer_rate_constant : SET[0:?] OF pty_aquifer_rate_constant FOR aquifer ;
 pty_effective_radius : SET[0:?] OF pty_effective_radius FOR aquifer ;
UNIQUE
 si: name;
END_ENTITY;

ENTITY area_cell
 SUBTYPE OF (
  technical_object
 );
 cell_height : ndt_length ;
 cell_orientation_angle : ndt_plane_angle ;
 cell_width : ndt_length ;
 horizontal_offset : OPTIONAL ndt_length ;
 horizontal_spacing : ndt_length ;
 identifier : ndt_name ;
 vertical_offset : OPTIONAL ndt_length ;
 vertical_spacing : ndt_length ;
 cell : cell ;
INVERSE
 pattern_fill : SET[1:?] OF area_pattern_fill FOR area_cell ;
UNIQUE
 si: identifier,
     cell;
END_ENTITY;

ENTITY area_element
 ABSTRACT SUPERTYPE OF (ONEOF(
  patterned_area,
  raster_image
 ))
 SUBTYPE OF (
  face,
  graphical_element
 );
 SELF\face.bounding_ring : OPTIONAL SET[0:?] OF ring_element ;
END_ENTITY;

ENTITY area_pattern_fill
 SUBTYPE OF (
  association
 );
 description : OPTIONAL ndt_comment ;
 ref_color : OPTIONAL ref_color ;
 symbol_library : symbol_library ;
 pattern_fill_type : pattern_fill_type ;
 hatch_line_pattern : OPTIONAL SET[0:?] OF hatch_line_pattern ;
 area_cell : OPTIONAL SET[0:?] OF area_cell ;
UNIQUE
 si: symbol_library,
     pattern_fill_type;
END_ENTITY;

ENTITY association
 ABSTRACT SUPERTYPE OF (ONEOF(
  activity_cause_and_effect,
  activity_fulfillment,
  activity_template_constraint,
  applied_coordinate_transformation,
  area_pattern_fill,
  cell,
  contract_activity_type,
  contract_reference,
  document_specification_placement,
  equipment_fulfillment,
  facility_fulfillment,
  fluid_component_interaction,
  fluid_phase_composition,
  fluid_phase_interface,
  fluid_saturation_condition,
  geologic_age_classification,
  geologic_process_sequence,
  guideline_or_privilege_remedy,
  image_palette,
  line_style,
  material_class_classification,
  material_fulfillment,
  pfnu_grid_cell_connection,
  process_data_item,
  regulation_reference,
  schedule_activity,
  schedule_constraint,
  seismic_facility_track,
  seismograph_recording,
  shell_region_binding,
  space_time_operation,
  text_style,
  transient_association,
  well_log_trace_class_classification,
  wellbore_geologic_target
 ))
 SUBTYPE OF (
  e_and_p_data
 );
END_ENTITY;

ENTITY binset
 ABSTRACT SUPERTYPE OF (ONEOF(
  binset_grid,
  binset_grid_variant
 ))
 SUBTYPE OF (
  composite_spatial_object,
  technical_object
 );
 binset_uid : OPTIONAL ndt_user_unique_identifier ;
 description : OPTIONAL ndt_comment ;
 name : ndt_name ;
 ref_binset_geometry_class : OPTIONAL ref_binset_geometry_class ;
 seismic_processing_activity : OPTIONAL seismic_processing_activity ;
 grid_structured : grid_structured ;
INVERSE
 bin_index_use : SET[0:?] OF seismic_header FOR bin_index_definition ;
 position_in_earth_model : SET[0:?] OF position_in_earth_model FOR binset ;
 grid_use : SET[0:?] OF seismic_header FOR use_processing_grid ;
 seismic_data_set : SET[0:?] OF seismic_data_set FOR binset ;
 pty_geometry_2d_edge : SET[0:?] OF pty_geometry_2d_edge FOR binset ;
 pty_geometry_2d_face : SET[0:?] OF pty_geometry_2d_face FOR binset ;
 pty_nominal_fold : SET[0:?] OF pty_nominal_fold FOR binset ;
 pty_trace_count : SET[0:?] OF pty_trace_count FOR binset ;
 pty_water_depth_array : SET[0:?] OF pty_water_depth_array FOR binset ;
 pty_geometry_1d_edge : SET[0:?] OF pty_geometry_1d_edge FOR binset ;
END_ENTITY;

ENTITY binset_grid
 SUBTYPE OF (
  binset
 );
 bin_node_name : OPTIONAL ndt_name_array ;
 bin_source_event : OPTIONAL ndt_uid_array ;
 bin_station : OPTIONAL ndt_uid_array ;
 bin_station_ratio : OPTIONAL ndt_rational ;
 geometry_definition : OPTIONAL SET[0:?] OF seismic_geometry_set ;
 seismic_geometry_set : seismic_geometry_set ;
 bin_source_event_logical : OPTIONAL ndt_logical_array ;
 bin_node_description : OPTIONAL ndt_comment_array ;
INVERSE
 binset_intersection : SET[0:?] OF binset_intersection FOR binset_grid ;
 seismic_traverse : SET[0:?] OF seismic_traverse FOR binset_grid ;
 pty_mistie_correction : SET[0:?] OF pty_mistie_correction FOR binset_grid ;
 binset_grid_variant : SET[0:?] OF binset_grid_variant FOR binset_grid ;
 processing_outline : SET[0:?] OF pty_geometry_2d_ring FOR binset_grid ;
 seismic_processing_vertex : SET[0:?] OF seismic_processing_vertex FOR binset_grid ;
UNIQUE
 si: name,
     seismic_geometry_set;
END_ENTITY;

ENTITY binset_grid_variant
 SUBTYPE OF (
  binset
 );
 binset_grid : binset_grid ;
 ref_grid_variant : OPTIONAL ref_grid_variant ;
UNIQUE
 si: name,
     binset_grid;
END_ENTITY;

ENTITY binset_intersection
 SUBTYPE OF (
  composite_spatial_object,
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 name : OPTIONAL ndt_name ;
 binset_grid : binset_grid ;
 intersected_geometry : OPTIONAL binset_intersection ;
INVERSE
 pty_mistie_estimate : SET[0:?] OF pty_mistie_estimate FOR binset_intersection ;
 pty_geometry_2d_edge : SET[0:?] OF pty_geometry_2d_edge FOR binset_intersection ;
 pty_geometry_2d_ring : SET[0:?] OF pty_geometry_2d_ring FOR binset_intersection ;
 pty_location_2d : SET[0:?] OF pty_location_2d FOR binset_intersection ;
 intersecting_geometry : BAG[0:1] OF binset_intersection FOR intersected_geometry ;
UNIQUE
 si: name,
     binset_grid,
     intersected_geometry;
WHERE
  val1 : exists (name) xor exists (intersected_geometry);
  mse : exists (intersected_geometry) xor exists (intersecting_geometry);
END_ENTITY;

ENTITY biostratigraphic_marker
 SUBTYPE OF (
  stratigraphic_marker
 );
 biozone_marker : OPTIONAL SET[0:?] OF biozone_marker ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY biozone
 SUBTYPE OF (
  chronozone
 );
 ref_biozone : ref_biozone ;
 SELF\temporal_period.temporal_event : OPTIONAL SET[0:?] OF biozone_marker ;
 rock_feature : OPTIONAL SET[0:?] OF rock_feature ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY biozone_marker
 SUBTYPE OF (
  temporal_event
 );
INVERSE
 biostratigraphic_marker : SET[0:?] OF biostratigraphic_marker FOR biozone_marker ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY blast_joint
 SUBTYPE OF (
  wellbore_tubular
 );
UNIQUE
 si: ref_existence_kind,
     belongs_to_assembly,
     identifier,
     wellbore;
END_ENTITY;

ENTITY borehole
 SUBTYPE OF (
  borehole_component
 );
 outer_diameter : OPTIONAL ndt_length_diameter ;
UNIQUE
 si: identifier,
     ref_existence_kind,
     wellbore,
     belongs_to_assembly;
END_ENTITY;

ENTITY borehole_component
 ABSTRACT SUPERTYPE OF (ONEOF(
  borehole,
  borehole_trajectory_section,
  enlarged_diameter_borehole_segment,
  open_borehole_segment,
  perforation_set,
  single_diameter_borehole_segment,
  temporary_completion,
  well_completion_segment
 ))
 SUBTYPE OF (
  wellbore_component_facility
 );
 borehole_component_length : OPTIONAL ndt_length ;
END_ENTITY;

ENTITY borehole_fluid_system
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     ref_existence_kind,
     identifying_facility;
END_ENTITY;

ENTITY borehole_generation_run
 SUBTYPE OF (
  wellbore_activity
 );
 ref_activity_termination_reason : OPTIONAL ref_activity_termination_reason ;
 well_operation_fluid : OPTIONAL well_operation_fluid ;
INVERSE
 core : SET[0:?] OF core FOR borehole_generation_run ;
 drill_cuttings_sample : SET[0:?] OF drill_cuttings_sample FOR borehole_generation_run ;
 well_log_trace : SET[0:?] OF well_log_trace FOR borehole_generation_run ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity,
     wellbore;
END_ENTITY;

ENTITY borehole_trajectory_section
 SUBTYPE OF (
  borehole_component
 );
 outer_diameter : OPTIONAL ndt_length_diameter ;
INVERSE
 pty_azimuth : SET[0:?] OF pty_azimuth FOR borehole_trajectory_section ;
 pty_inclination_from_vertical : SET[0:?] OF pty_inclination_from_vertical FOR borehole_trajectory_section ;
UNIQUE
 si: identifier,
     ref_existence_kind,
     wellbore,
     belongs_to_assembly;
END_ENTITY;

ENTITY bottomhole
 SUBTYPE OF (
  wellbore_reference
 );
UNIQUE
 si: identifier,
     ref_existence_kind,
     wellbore,
     belongs_to_assembly;
END_ENTITY;

ENTITY bottomhole_assembly
 SUBTYPE OF (
  wellbore_device
 );
 inner_diameter : OPTIONAL ndt_length_diameter ;
UNIQUE
 si: ref_existence_kind,
     identifier,
     wellbore,
     belongs_to_assembly;
END_ENTITY;

ENTITY boundary_class
 SUBTYPE OF (
  classification_class
 );
INVERSE
 boundary_classification : SET[0:?] OF boundary_classification FOR boundary_class ;
UNIQUE
 si: name,
     classification_system;
END_ENTITY;

ENTITY boundary_classification
 SUBTYPE OF (
  transient_association
 );
 boundary_class : boundary_class ;
 feature_boundary : feature_boundary ;
UNIQUE
 si: end_time,
     start_time,
     boundary_class,
     feature_boundary;
END_ENTITY;

ENTITY bridge_plug
 SUBTYPE OF (
  wellbore_device
 );
UNIQUE
 si: identifier,
     ref_existence_kind,
     belongs_to_assembly,
     wellbore;
END_ENTITY;

ENTITY building
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     identifying_facility,
     ref_existence_kind;
END_ENTITY;

ENTITY bulk_storage_system
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     ref_existence_kind,
     identifying_facility;
END_ENTITY;

ENTITY business_associate
 SUBTYPE OF (
  business_object,
  product_flow_network_unit
 );
 description : OPTIONAL ndt_comment ;
 end_date : OPTIONAL ndt_date_tod ;
 identifier : ndt_name ;
 ref_naming_system : OPTIONAL ref_naming_system ;
 start_date : OPTIONAL ndt_date_tod ;
 kind : ref_business_associate ;
INVERSE
 applicant_for : SET[0:?] OF application_for_permit FOR applicant ;
 reserves_approved : SET[0:?] OF reserves FOR approved_by ;
 contract_remark : SET[0:?] OF contract_remark FOR business_associate ;
 business_associate_alias : SET[0:?] OF business_associate_alias FOR business_associate ;
 used_in_association : SET[0:?] OF business_association FOR associated_with ;
 contract_designation : SET[0:?] OF contract_designation FOR business_associate ;
 regulation : SET[0:?] OF regulation FOR business_associate ;
 make_contact : SET[0:?] OF business_contact FOR contactor ;
 contacted_by : SET[0:?] OF business_contact FOR contactee ;
 has_association : SET[0:?] OF business_association FOR business_associate ;
 business_associate_privilege : SET[0:?] OF business_associate_privilege FOR business_associate ;
 business_associate_facility_association : SET[0:?] OF business_associate_facility_association FOR business_associate ;
 address : SET[0:?] OF address FOR business_associate ;
 business_associate_security_status : SET[0:?] OF business_associate_security_status FOR business_associate ;
 derived_interest_makeup : SET[0:?] OF derived_interest_makeup FOR interest_of ;
 source_for : SET[0:?] OF data_collection FOR business_associate ;
 issue_permits : SET[0:?] OF permit_specification FOR issued_by ;
 business_associate_land_feature_role : SET[0:?] OF business_associate_land_feature_role FOR business_associate ;
 business_associate_activity_role : SET[0:?] OF business_associate_activity_role FOR business_associate ;
 business_associate_service : SET[0:?] OF business_associate_service FOR business_associate ;
 recorded_document_specification : SET[0:?] OF recorded_document_specification FOR business_associate ;
 business_associate_injury : SET[0:?] OF business_associate_injury FOR business_associate ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY business_associate_activity_role
 SUBTYPE OF (
  transient_association
 );
 ref_business_associate_activity_role : OPTIONAL ref_business_associate_activity_role ;
 activity : activity ;
 business_associate : business_associate ;
UNIQUE
 si: end_time,
     ref_business_associate_activity_role,
     start_time,
     business_associate,
     activity;
END_ENTITY;

ENTITY business_associate_alias
 SUBTYPE OF (
  object_alias
 );
 business_associate : business_associate ;
 identifier : ndt_name ;
UNIQUE
 si: effective_date,
     expiry_date,
     ref_naming_system,
     business_associate;
END_ENTITY;

ENTITY business_associate_facility_association
 SUBTYPE OF (
  transient_association
 );
 ref_business_associate_facility_role : ref_business_associate_facility_role ;
 facility : facility ;
 business_associate : business_associate ;
INVERSE
 contract : SET[0:?] OF contract FOR business_associate_facility_association ;
UNIQUE
 si: end_time,
     ref_business_associate_facility_role,
     start_time,
     facility,
     business_associate;
END_ENTITY;

ENTITY business_associate_injury
 SUBTYPE OF (
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 lost_time : OPTIONAL ndt_time ;
 monetary_loss : OPTIONAL ndt_money ;
 ref_business_associate_injury : ref_business_associate_injury ;
 incident_of_noncompliance : OPTIONAL incident_of_noncompliance ;
 business_associate : business_associate ;
INVERSE
 incident_report : SET[0:?] OF incident_report FOR business_associate_injury ;
UNIQUE
 si: ref_business_associate_injury,
     business_associate;
END_ENTITY;

ENTITY business_associate_job_title
 SUBTYPE OF (
  transient_association
 );
 ref_business_associate_job_title : ref_business_associate_job_title ;
 business_association : business_association ;
UNIQUE
 si: end_time,
     start_time,
     ref_business_associate_job_title,
     business_association;
END_ENTITY;

ENTITY business_associate_land_feature_role
 SUBTYPE OF (
  transient_association
 );
 ref_business_associate_land_feature_role : ref_business_associate_land_feature_role ;
 earth_surface_feature : earth_surface_feature ;
 business_associate : business_associate ;
UNIQUE
 si: end_time,
     ref_business_associate_land_feature_role,
     start_time;
END_ENTITY;

ENTITY business_associate_privilege
 SUBTYPE OF (
  guideline_or_privilege
 );
 ref_business_associate_privilege : ref_business_associate_privilege ;
 text : OPTIONAL ndt_text ;
 business_associate : business_associate ;
UNIQUE
 si: identifier,
     ref_business_associate_privilege,
     business_associate;
END_ENTITY;

ENTITY business_associate_security_status
 SUBTYPE OF (
  transient_association
 );
 ref_business_associate_security_class : ref_business_associate_security_class ;
 ref_business_association_role : OPTIONAL ref_business_association_role ;
 business_associate : business_associate ;
UNIQUE
 si: end_time,
     ref_business_associate_security_class,
     ref_business_association_role,
     start_time,
     business_associate;
END_ENTITY;

ENTITY business_associate_service
 SUBTYPE OF (
  transient_association
 );
 ref_business_associate_service : ref_business_associate_service ;
 business_associate : business_associate ;
UNIQUE
 si: end_time,
     ref_business_associate_service,
     start_time,
     business_associate;
END_ENTITY;

ENTITY business_association
 SUBTYPE OF (
  transient_association
 );
 ref_business_association_role : ref_business_association_role ;
 ref_business_association_structure : ref_business_association_structure ;
 associated_with : business_associate ;
 business_associate : business_associate ;
INVERSE
 business_associate_job_title : SET[0:?] OF business_associate_job_title FOR business_association ;
UNIQUE
 si: end_time,
     ref_business_association_role,
     start_time,
     associated_with,
     business_associate;
WHERE
  dri : business_associate :<>: associated_with;
END_ENTITY;

ENTITY business_contact
 SUBTYPE OF (
  transient_association
 );
 ref_business_contact_purpose : OPTIONAL ref_business_contact_purpose ;
 ref_business_contact_result : OPTIONAL ref_business_contact_result ;
 contactee : business_associate ;
 contactor : business_associate ;
UNIQUE
 si: end_time,
     ref_business_contact_purpose,
     start_time,
     contactor,
     contactee;
WHERE
  dri : contactor :<>: contactee;
END_ENTITY;

ENTITY business_object
 ABSTRACT SUPERTYPE OF (ONEOF(
  address,
  business_associate,
  catalog_equipment,
  contract_designation,
  damage_area,
  discovery_area,
  divestment_package,
  document_specification,
  facility,
  field,
  fluid_flow_stream,
  general_land_right,
  geoid_model,
  geophysical_acquisition_area,
  geopolitical_feature,
  guideline_or_privilege,
  hole_type,
  inventory_object,
  land_property_boundary,
  land_property_parcel,
  land_property_volume,
  legal_survey_area,
  legal_survey_boundary,
  legal_survey_line,
  legal_survey_point,
  mineral_zone,
  object_abundance_class,
  outcrop,
  property_damage,
  ranking_system,
  regulatory_area,
  relative_rank,
  reserves,
  reserves_sale_commitment,
  reservoir_fluid_system,
  rock_fluid_feature,
  schedule,
  seismic_data_set,
  seismic_geometry_set,
  seismic_line_segment,
  seismic_traverse,
  unitized_land_parcel_area,
  well_surface_point
 ))
 SUBTYPE OF (
  object_of_interest
 );
 subject_of_contract : OPTIONAL SET[0:?] OF contract ;
INVERSE
 derived_interest : SET[0:?] OF derived_interest_makeup FOR interest_for ;
 subject_of_contract_designation : SET[0:?] OF contract_designation FOR contract_designation_object ;
 guideline_or_privilege : SET[0:?] OF guideline_or_privilege FOR business_object ;
 guideline_or_privilege_compliance : SET[0:?] OF guideline_or_privilege_compliance FOR business_object ;
 satisfy_obligation : SET[0:?] OF contractual_obligation FOR contractual_obligation_object ;
END_ENTITY;

ENTITY capillary_pressure_curve
 SUBTYPE OF (
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 ref_capillary_pressure : ref_capillary_pressure ;
 rock_fluid_interaction : rock_fluid_interaction ;
 nonwetting_phase : fluid_phase ;
 wetting_phase : fluid_phase ;
INVERSE
 capillary_pressure_point : SET[0:?] OF capillary_pressure_point FOR capillary_pressure_curve ;
 pty_capillary_pressure_curve : SET[0:?] OF pty_capillary_pressure_curve FOR capillary_pressure_curve ;
UNIQUE
 si: ref_capillary_pressure,
     rock_fluid_interaction,
     nonwetting_phase,
     wetting_phase;
WHERE
  dri : wetting_phase :<>: nonwetting_phase;
END_ENTITY;

ENTITY capillary_pressure_point
 SUBTYPE OF (
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 ref_capillary_pressure : ref_capillary_pressure ;
 ref_capillary_pressure_usage : OPTIONAL ref_capillary_pressure_usage ;
 rock_fluid_interaction : OPTIONAL rock_fluid_interaction ;
 capillary_pressure_curve : OPTIONAL capillary_pressure_curve ;
 nonwetting_phase : fluid_phase ;
 wetting_phase : fluid_phase ;
INVERSE
 pty_capillary_pressure_point : SET[0:?] OF pty_capillary_pressure_point FOR capillary_pressure_point ;
UNIQUE
 si: ref_capillary_pressure,
     ref_capillary_pressure_usage,
     capillary_pressure_curve,
     rock_fluid_interaction,
     nonwetting_phase,
     wetting_phase;
WHERE
  dri : wetting_phase :<>: nonwetting_phase;
  mse : exists (capillary_pressure_curve) xor exists (rock_fluid_interaction);
END_ENTITY;

ENTITY carter_legal_survey_area
 SUBTYPE OF (
  legal_survey_area
 );
 range : OPTIONAL ndt_pint1 ;
 ref_east_or_west : OPTIONAL ref_east_or_west ;
 ref_north_or_south : OPTIONAL ref_north_or_south ;
 subdivision : OPTIONAL ndt_name ;
 township : OPTIONAL ndt_pint1 ;
 township_range_section : OPTIONAL ndt_pint1 ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY casing_centralizer
 SUBTYPE OF (
  wellbore_device
 );
 inner_diameter : OPTIONAL ndt_length_diameter ;
UNIQUE
 si: identifier,
     wellbore,
     belongs_to_assembly,
     ref_existence_kind;
END_ENTITY;

ENTITY casing_segment
 SUBTYPE OF (
  wellbore_tubular
 );
UNIQUE
 si: ref_existence_kind,
     belongs_to_assembly,
     identifier,
     wellbore;
END_ENTITY;

ENTITY casing_shoe
 SUBTYPE OF (
  wellbore_device
 );
 inner_diameter : OPTIONAL ndt_length_diameter ;
UNIQUE
 si: identifier,
     wellbore,
     belongs_to_assembly,
     ref_existence_kind;
END_ENTITY;

ENTITY casing_string
 SUBTYPE OF (
  wellbore_tubular
 );
INVERSE
 cement_casing_string : SET[0:?] OF cement_casing_string FOR casing_string ;
 pty_surface_roughness : SET[0:?] OF pty_surface_roughness FOR casing_string ;
 setting_depth : SET[0:?] OF pty_location_1d FOR casing_string ;
UNIQUE
 si: identifier,
     ref_existence_kind,
     wellbore,
     belongs_to_assembly;
END_ENTITY;

ENTITY catalog_anchor
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_compressor
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_control_device
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_core_bit
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_directional_survey_tool
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_drill_bit
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_drill_collar
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_drill_pipe
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_electric_generator
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_equipment
 SUPERTYPE OF (ONEOF(
  catalog_anchor,
  catalog_compressor,
  catalog_control_device,
  catalog_core_bit,
  catalog_directional_survey_tool,
  catalog_drill_bit,
  catalog_drill_collar,
  catalog_drill_pipe,
  catalog_electric_generator,
  catalog_fluid_viscometer,
  catalog_motor,
  catalog_nozzle,
  catalog_position_sensor,
  catalog_pressure_vessel,
  catalog_pump,
  catalog_pump_liner,
  catalog_rotary_shouldered_connection,
  catalog_separator,
  catalog_solids_control_equipment,
  catalog_stabilizer,
  catalog_tank,
  catalog_transformer,
  catalog_tubing,
  catalog_tubular_coupling,
  catalog_underreamer,
  catalog_wellhead
 ))
 SUBTYPE OF (
  business_object
 );
 description : OPTIONAL ndt_comment ;
 end_date : OPTIONAL ndt_date ;
 identifier : OPTIONAL ndt_name ;
 ref_naming_system : OPTIONAL ref_naming_system ;
 start_date : OPTIONAL ndt_date ;
INVERSE
 catalog_equipment_classification : SET[0:?] OF catalog_equipment_classification FOR member ;
 catalog_equipment_alias : SET[0:?] OF catalog_equipment_alias FOR catalog_equipment ;
 typical_facility_equipment_specification : SET[0:?] OF typical_facility_equipment_specification FOR catalog_equipment ;
 successors : SET[0:?] OF catalog_equipment_succession FOR succeeded ;
 catalog_equipment_material_specification : SET[0:?] OF catalog_equipment_material_specification FOR catalog_equipment ;
 versions : SET[0:?] OF catalog_equipment_version FOR original ;
 part_of : SET[0:?] OF catalog_equipment_composition FOR part ;
 equipment_item : SET[0:?] OF equipment_item FOR catalog_equipment ;
 succeeds : SET[0:?] OF catalog_equipment_succession FOR successor ;
 originals : SET[0:?] OF catalog_equipment_version FOR version ;
 composed_of : SET[0:?] OF catalog_equipment_composition FOR whole ;
 pty_equipment_facility : SET[0:?] OF pty_equipment_facility FOR catalog_equipment ;
 catalog_equipment_installation : SET[0:?] OF catalog_equipment_installation FOR catalog_equipment ;
 catalog_item_assembly : SET[0:?] OF catalog_item_assembly FOR part ;
 catalog_item_collection : SET[0:?] OF catalog_item_collection FOR part ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_equipment_alias
 SUBTYPE OF (
  object_alias
 );
 catalog_equipment : catalog_equipment ;
 identifier : ndt_name ;
UNIQUE
 si: effective_date,
     expiry_date,
     ref_naming_system,
     catalog_equipment;
END_ENTITY;

ENTITY catalog_equipment_classification
 SUBTYPE OF (
  transient_association
 );
 equipment_class : equipment_class ;
 member : catalog_equipment ;
UNIQUE
 si: end_time,
     start_time,
     equipment_class,
     member;
END_ENTITY;

ENTITY catalog_equipment_composition
 SUBTYPE OF (
  transient_association
 );
 part : catalog_equipment ;
 whole : catalog_equipment ;
UNIQUE
 si: end_time,
     start_time,
     part,
     whole;
END_ENTITY;

ENTITY catalog_equipment_installation
 SUBTYPE OF (
  equipment_installation
 );
 catalog_equipment : catalog_equipment ;
 item_count : OPTIONAL ndt_int4 ;
UNIQUE
 si: catalog_equipment,
     facility,
     end_time,
     start_time;
END_ENTITY;

ENTITY catalog_equipment_material_specification
 SUBTYPE OF (
  transient_association
 );
 catalog_equipment : catalog_equipment ;
 typical_material : typical_material ;
UNIQUE
 si: end_time,
     start_time,
     catalog_equipment,
     typical_material;
END_ENTITY;

ENTITY catalog_equipment_succession
 SUBTYPE OF (
  transient_association
 );
 succeeded : catalog_equipment ;
 successor : catalog_equipment ;
UNIQUE
 si: end_time,
     start_time,
     succeeded,
     successor;
END_ENTITY;

ENTITY catalog_equipment_version
 SUBTYPE OF (
  transient_association
 );
 original : catalog_equipment ;
 version : catalog_equipment ;
UNIQUE
 si: end_time,
     start_time,
     original,
     version;
END_ENTITY;

ENTITY catalog_fluid_viscometer
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_item_assembly
 SUBTYPE OF (
  equipment_composition
 );
 item_count : OPTIONAL ndt_int4 ;
 part : catalog_equipment ;
UNIQUE
 si: part,
     start_time,
     whole;
END_ENTITY;

ENTITY catalog_item_collection
 SUBTYPE OF (
  equipment_composition
 );
 item_count : OPTIONAL ndt_int4 ;
 part : catalog_equipment ;
UNIQUE
 si: part,
     start_time,
     whole;
END_ENTITY;

ENTITY catalog_motor
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_nozzle
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_position_sensor
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_pressure_vessel
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_pump
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_pump_liner
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_rotary_shouldered_connection
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_separator
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_solids_control_equipment
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_stabilizer
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_tank
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_transformer
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_tubing
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_tubular_coupling
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_underreamer
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY catalog_wellhead
 SUBTYPE OF (
  catalog_equipment
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY cell
 SUBTYPE OF (
  association
 );
 description : OPTIONAL ndt_comment ;
 symbol_library : symbol_library ;
 symbol_type : symbol_type ;
INVERSE
 incell : SET[0:?] OF incell FOR cell ;
 terminal_cell : SET[0:?] OF terminal_cell FOR cell ;
 area_cell : SET[0:?] OF area_cell FOR cell ;
 cell_shape : SET[1:?] OF graphical_element FOR cell ;
UNIQUE
 si: symbol_library,
     symbol_type;
END_ENTITY;

ENTITY cement
 SUBTYPE OF (
  material,
  technical_object
 );
 identifier : OPTIONAL ndt_name ;
INVERSE
 pty_yield : SET[0:?] OF pty_yield FOR cement ;
 pty_density_liquid : SET[0:?] OF pty_density_liquid FOR cement ;
UNIQUE
 si: ref_existence_kind,
     identifier;
END_ENTITY;

ENTITY cement_casing_string
 SUBTYPE OF (
  wellbore_activity
 );
 casing_string : casing_string ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     casing_string,
     containing_activity,
     wellbore;
END_ENTITY;

ENTITY cement_type
 SUBTYPE OF (
  chemical_product_type
 );
UNIQUE
 si: name;
END_ENTITY;

ENTITY chemical_compound_type
 SUBTYPE OF (
  chemical_product_type
 );
INVERSE
 pty_polarized_light_rotation_angle : SET[0:?] OF pty_polarized_light_rotation_angle FOR chemical_compound_type ;
 pty_tensile_strength : SET[0:?] OF pty_tensile_strength FOR chemical_compound_type ;
UNIQUE
 si: name;
END_ENTITY;

ENTITY chemical_element_type
 SUBTYPE OF (
  technical_object,
  typical_material
 );
UNIQUE
 si: name;
END_ENTITY;

ENTITY chemical_product_type
 ABSTRACT SUPERTYPE OF (ONEOF(
  cement_type,
  chemical_compound_type,
  gravel_type,
  metallic_compound_type,
  oil_based_mud_type,
  solid_additive_type,
  solids_free_fluid_type,
  standard_fluid_system,
  water_based_mud_type
 ))
 SUBTYPE OF (
  technical_object,
  typical_material
 );
END_ENTITY;

ENTITY choke
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     identifying_facility,
     ref_existence_kind;
END_ENTITY;

ENTITY choke_adjustment_event
 SUBTYPE OF (
  activity
 );
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY chronostratigraphic_boundary
 SUBTYPE OF (
  stratigraphic_marker
 );
 geochronologic_event : OPTIONAL SET[0:?] OF geochronologic_event ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY chronozone
 SUPERTYPE OF (ONEOF(
  biozone
 ))
 SUBTYPE OF (
  temporal_period
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY classification_class
 ABSTRACT SUPERTYPE OF (ONEOF(
  activity_class,
  boundary_class,
  document_specification_class,
  equipment_class,
  facility_class,
  hole_class,
  material_class,
  reserves_class,
  rock_fluid_feature_class,
  seismic_feature_class,
  seismic_geometry_class,
  uncertainty_class,
  well_log_trace_class
 ))
 SUBTYPE OF (
  reference_behavior,
  subject_of_guideline_or_privilege,
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 end_date : OPTIONAL ndt_date ;
 name : ndt_long_name ;
 start_date : OPTIONAL ndt_date ;
 classification_system : OPTIONAL classification_system ;
INVERSE
 pty_equipment_facility : SET[0:?] OF pty_equipment_facility FOR classification_class ;
END_ENTITY;

ENTITY classification_system
 SUBTYPE OF (
  reference_behavior,
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 name : ndt_name ;
 kind : OPTIONAL ref_classification_system ;
INVERSE
 classification_class : SET[0:?] OF classification_class FOR classification_system ;
 equipment_class_alias : SET[0:?] OF equipment_class_alias FOR classification_system ;
 facility_class_alias : SET[0:?] OF facility_class_alias FOR classification_system ;
 material_class_alias : SET[0:?] OF material_class_alias FOR classification_system ;
 activity_class_alias : SET[0:?] OF activity_class_alias FOR classification_system ;
 well_log_trace_class_alias : SET[0:?] OF well_log_trace_class_alias FOR classification_system ;
UNIQUE
 si: name;
END_ENTITY;

ENTITY co_and_o_agreement
 SUBTYPE OF (
  partnership_agreement
 );
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY coiled_tubing
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     identifying_facility,
     ref_existence_kind;
END_ENTITY;

ENTITY coiled_tubing_reel
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     identifying_facility,
     ref_existence_kind;
END_ENTITY;

ENTITY coiled_tubing_section
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     identifying_facility,
     ref_existence_kind;
END_ENTITY;

ENTITY coiled_tubing_unit
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     identifying_facility,
     ref_existence_kind;
END_ENTITY;

ENTITY collar
 SUBTYPE OF (
  wellbore_device
 );
UNIQUE
 si: ref_existence_kind,
     identifier,
     wellbore,
     belongs_to_assembly;
END_ENTITY;

ENTITY color_palette
 SUBTYPE OF (
  image_palette
 );
UNIQUE
 si: symbol_library,
     image_palette_type;
END_ENTITY;

ENTITY commingling_permit
 SUBTYPE OF (
  permit_specification
 );
 well_completion : SET[1:?] OF well_completion ;
UNIQUE
 si: identifier,
     issued_by;
END_ENTITY;

ENTITY component_material
 SUBTYPE OF (
  material_composition
 );
 uncertainty_class : OPTIONAL uncertainty_class ;
 incorporate : material ;
 SELF\material_composition.characterize : material ;
INVERSE
 pty_volume_fraction : SET[0:?] OF pty_volume_fraction FOR component_material ;
 pty_mass_fraction : SET[0:?] OF pty_mass_fraction FOR component_material ;
 pty_mole_fraction : SET[0:?] OF pty_mole_fraction FOR component_material ;
UNIQUE
 si: end_time,
     start_time,
     SELF\material_composition.characterize,
     incorporate;
END_ENTITY;

ENTITY component_material_type
 SUBTYPE OF (
  material_composition
 );
 object_abundance_class : OPTIONAL object_abundance_class ;
 uncertainty_class : OPTIONAL uncertainty_class ;
 described_material_type : OPTIONAL typical_material ;
 typical_material : typical_material ;
INVERSE
 pty_concentration_volume_per_mole : SET[0:?] OF pty_concentration_volume_per_mole FOR component_material_type ;
 pty_absolute_abundance : SET[0:?] OF pty_absolute_abundance FOR component_material_type ;
 pty_mole_fraction : SET[0:?] OF pty_mole_fraction FOR component_material_type ;
 pty_volume_fraction : SET[0:?] OF pty_volume_fraction FOR component_material_type ;
 pty_mass_fraction : SET[0:?] OF pty_mass_fraction FOR component_material_type ;
 pty_concentration_mass_per_mass : SET[0:?] OF pty_concentration_mass_per_mass FOR component_material_type ;
 pty_concentration_mass_per_volume : SET[0:?] OF pty_concentration_mass_per_volume FOR component_material_type ;
 pty_concentration_volume_per_volume : SET[0:?] OF pty_concentration_volume_per_volume FOR component_material_type ;
 pty_concentration_mole_per_volume : SET[0:?] OF pty_concentration_mole_per_volume FOR component_material_type ;
 pty_relative_abundance : SET[0:?] OF pty_relative_abundance FOR component_material_type ;
UNIQUE
 si: end_time,
     start_time,
     described_material_type,
     characterize,
     typical_material;
WHERE
  mse : exists (characterize) xor exists (described_material_type);
END_ENTITY;

ENTITY compose_document_specification
 SUBTYPE OF (
  activity
 );
 symbol_library : OPTIONAL SET[0:?] OF symbol_library ;
INVERSE
 document_specification : SET[0:?] OF document_specification FOR compose_document_specification ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY composite_graphical_element
 SUBTYPE OF (
  composite_spatial_object,
  graphical_element
 );
INVERSE
 composition : SET[0:?] OF graphical_element FOR graphical_element_component ;
UNIQUE
 si: identifier,
     document_specification,
     depicted_object;
END_ENTITY;

ENTITY composite_spatial_object
 ABSTRACT SUPERTYPE OF (ONEOF(
  binset,
  binset_intersection,
  composite_graphical_element,
  earth_position_composite,
  other_composite_spatial_object,
  seismic_geometry_set,
  seismic_line_segment,
  seismic_traverse,
  well,
  wellbore_composite_position
 ))
 SUBTYPE OF (
  spatial_object
 );
INVERSE
 pty_bounding_rectangle : SET[0:?] OF pty_bounding_rectangle FOR composite_spatial_object ;
END_ENTITY;

ENTITY congressional_legal_survey_area
 SUBTYPE OF (
  legal_survey_area
 );
 lot_number : OPTIONAL ndt_pint1 ;
 polygon_description : OPTIONAL ndt_comment ;
 principal_meridian : OPTIONAL ndt_name ;
 range : OPTIONAL ndt_pint1 ;
 range_fraction : OPTIONAL ndt_name ;
 ref_east_or_west : OPTIONAL ref_east_or_west ;
 ref_north_or_south : OPTIONAL ref_north_or_south ;
 section_suffix : OPTIONAL ndt_code1 ;
 section_type : OPTIONAL ndt_name ;
 subdivision : OPTIONAL ndt_comment ;
 township : OPTIONAL ndt_pint1 ;
 township_fraction : OPTIONAL ndt_name ;
 township_name : OPTIONAL ndt_name ;
 township_range_section : OPTIONAL ndt_pint1 ;
 tract_number : OPTIONAL ndt_pint1 ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY contract
 ABSTRACT SUPERTYPE OF (ONEOF(
  marketing_agreement,
  mineral_agreement,
  partnership_agreement,
  service_agreement,
  surface_agreement,
  title_agreement
 ))
 SUBTYPE OF (
  recorded_document_specification
 );
 duration : OPTIONAL ndt_time ;
 effective_date : OPTIONAL ndt_date_tod ;
 execution_date : OPTIONAL ndt_date_tod ;
 expiry_date : OPTIONAL ndt_date_tod ;
 original_expiry_date : OPTIONAL ndt_date_tod ;
 ref_naming_system : OPTIONAL ref_naming_system ;
 contract_remark : OPTIONAL LIST[0:?] OF UNIQUE contract_remark ;
 contract_clause : OPTIONAL LIST[0:?] OF UNIQUE contract_clause ;
 activity : OPTIONAL SET[0:?] OF activity ;
 business_associate_facility_association : OPTIONAL SET[0:?] OF business_associate_facility_association ;
INVERSE
 part_of : SET[0:?] OF contract_reference FOR from_contract ;
 composed_of : SET[0:?] OF contract_reference FOR for_contract ;
 encumbrance : SET[0:?] OF encumbrance FOR contract ;
 contract_alias : SET[0:?] OF contract_alias FOR contract ;
 contract_designation : SET[0:?] OF contract_designation FOR contract ;
 obligation : SET[0:?] OF contractual_obligation FOR contract ;
 contract_status : SET[0:?] OF contract_status FOR contract ;
 pty_contract_processing_fee : SET[0:?] OF pty_contract_processing_fee FOR contract ;
 contract_activity_type : SET[0:?] OF contract_activity_type FOR contract ;
 contract_business_object : SET[0:?] OF business_object FOR subject_of_contract ;
END_ENTITY;

ENTITY contract_activity_type
 SUBTYPE OF (
  association
 );
 description : OPTIONAL ndt_comment ;
 contract : OPTIONAL contract ;
 contractual_obligation : OPTIONAL contractual_obligation ;
 typical_activity : typical_activity ;
UNIQUE
 si: contract,
     contractual_obligation,
     typical_activity;
WHERE
  mse : exists (contract) or exists (contractual_obligation);
END_ENTITY;

ENTITY contract_alias
 SUBTYPE OF (
  object_alias
 );
 contract : contract ;
 identifier : ndt_name ;
UNIQUE
 si: effective_date,
     expiry_date,
     ref_naming_system,
     contract;
END_ENTITY;

ENTITY contract_amendment_clause
 SUBTYPE OF (
  contract_clause
 );
 amendment_date : OPTIONAL ndt_date ;
 ref_clause_amendment_reason : OPTIONAL ref_clause_amendment_reason ;
 amend_contract_clause : contract_clause ;
UNIQUE
 si: name,
     ref_contract_clause,
     contract_clause_set,
     contract;
WHERE
  dri : self :<>: amend_contract_clause;
END_ENTITY;

ENTITY contract_clause
 SUPERTYPE OF (ONEOF(
  contract_amendment_clause
 ))
 SUBTYPE OF (
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 name : OPTIONAL ndt_name ;
 ref_contract_clause : OPTIONAL ref_contract_clause ;
 text : OPTIONAL ndt_text ;
 text_location : OPTIONAL ndt_name ;
 contract_clause_set : OPTIONAL contract_clause_set ;
INVERSE
 contract_amendment_clause : SET[0:?] OF contract_amendment_clause FOR amend_contract_clause ;
 contractual_obligation : SET[0:?] OF contractual_obligation FOR contract_clause ;
 contract : BAG[0:1] OF contract FOR contract_clause ;
 contract_clause_item : SET[0:?] OF contract_clause_item FOR contract_clause ;
UNIQUE
 si: name,
     ref_contract_clause,
     contract_clause_set,
     contract;
WHERE
  mse : exists (contract) or exists (contract_clause_set);
END_ENTITY;

ENTITY contract_clause_item
 SUBTYPE OF (
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 item_count : OPTIONAL ndt_pint2 ;
 item_date : OPTIONAL ndt_date_tod ;
 item_quantity : OPTIONAL ndt_any_quantity ;
 monetary_value : OPTIONAL ndt_money ;
 ref_contract_clause_item : ref_contract_clause_item ;
 contract_clause : contract_clause ;
UNIQUE
 si: ref_contract_clause_item,
     contract_clause;
END_ENTITY;

ENTITY contract_clause_set
 SUBTYPE OF (
  document_specification
 );
INVERSE
 contract_clause : SET[0:?] OF contract_clause FOR contract_clause_set ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY contract_designation
 SUPERTYPE OF (ONEOF(
  depository_designation,
  interest_designation,
  ownership_designation
 ))
 SUBTYPE OF (
  business_object
 );
 description : OPTIONAL ndt_comment ;
 effective_date : OPTIONAL ndt_date_tod ;
 expiry_date : OPTIONAL ndt_date_tod ;
 business_associate_role : ref_contract_designation ;
 contract : OPTIONAL contract ;
 contract_designation_object : OPTIONAL SET[0:?] OF business_object ;
 contractual_obligation : OPTIONAL contractual_obligation ;
 business_associate : business_associate ;
 address : OPTIONAL address ;
INVERSE
 derived_interest_usage : SET[0:?] OF derived_interest_makeup FOR basis ;
UNIQUE
 si: effective_date,
     expiry_date,
     business_associate_role,
     contract,
     business_associate;
WHERE
  sri : address <=
    business_associate.address;
END_ENTITY;

ENTITY contract_processing_operation
 SUBTYPE OF (
  activity
 );
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY contract_reference
 SUBTYPE OF (
  association
 );
 description : OPTIONAL ndt_comment ;
 ref_contract_reference_use : ref_contract_reference_use ;
 for_contract : contract ;
 from_contract : contract ;
UNIQUE
 si: ref_contract_reference_use,
     for_contract,
     from_contract;
END_ENTITY;

ENTITY contract_remark
 SUBTYPE OF (
  technical_object
 );
 remark : ndt_text ;
 remark_date : OPTIONAL ndt_date_tod ;
 business_associate : OPTIONAL business_associate ;
INVERSE
 contract : contract FOR contract_remark ;
UNIQUE
 si: remark_date,
     contract,
     business_associate;
END_ENTITY;

ENTITY contract_status
 SUBTYPE OF (
  transient_association
 );
 ref_contract_status : ref_contract_status ;
 contract : contract ;
UNIQUE
 si: end_time,
     start_time,
     contract;
END_ENTITY;

ENTITY contractual_obligation
 SUBTYPE OF (
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 due_date : OPTIONAL ndt_date_tod ;
 effective_date : OPTIONAL ndt_date_tod ;
 expiry_date : OPTIONAL ndt_date_tod ;
 identifier : ndt_name ;
 ref_contract_obligation : OPTIONAL ref_contract_obligation ;
 ref_obligation_frequency : OPTIONAL ref_obligation_frequency ;
 contract_clause : OPTIONAL SET[0:?] OF contract_clause ;
 contract : contract ;
 contractual_obligation_activity : OPTIONAL SET[0:?] OF activity ;
 contractual_obligation_object : OPTIONAL SET[0:?] OF business_object ;
INVERSE
 contract_activity_type : SET[0:?] OF contract_activity_type FOR contractual_obligation ;
 contract_designation : SET[0:?] OF contract_designation FOR contractual_obligation ;
UNIQUE
 si: identifier,
     contract;
WHERE
  sri : sizeof( query( c <* contract_clause | c.contract = contract )) <> 0;
END_ENTITY;

ENTITY coordinate_system
 ABSTRACT SUPERTYPE OF (ONEOF(
  geocentric_coordinate_system,
  geographic_coordinate_system,
  local_spatial_coordinate_system,
  nonspatial_coordinate_system,
  projected_coordinate_system
 ))
 SUBTYPE OF (
  reference_behavior,
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 identifier : ndt_name ;
 ref_axis_orientation : OPTIONAL ref_axis_orientation ;
 ref_coordinate_system_constraint : ref_coordinate_system_constraint ;
 ref_naming_system : OPTIONAL ref_naming_system ;
 coordinate_system_axis : OPTIONAL LIST[1:?] OF UNIQUE coordinate_system_axis ;
 earth_surface_feature : OPTIONAL SET[0:?] OF earth_surface_feature ;
 vertex : OPTIONAL vertex ;
INVERSE
 coordinate_system_alias : SET[0:?] OF coordinate_system_alias FOR coordinate_system ;
 source_for : SET[0:?] OF applied_coordinate_transformation FOR source_coordinate_system ;
 target_for : SET[0:?] OF applied_coordinate_transformation FOR target_coordinate_system ;
UNIQUE
 si: identifier;
WHERE
  val : exists (coordinate_system_axis);
  sri : (* The following rule is a dummy which should always test true. *)
    exists(identifier)
    (* The following rule is not currently supported by POSC because
    functions are not supported. This has been included as a guide to how
    the model intent might be supported at a local site.
    constraint_type_valid : axis_type_correlation( SELF );
    FUNCTION axis_type_correlation ( coordinate_system : coordinate_system ) :
    BOOLEAN;
    ALIAS csa FOR coordinate_system.coordinate_system_axis;
    ALIAS rcsc FOR coordinate_system.ref_coordinate_system_constraint;
    REPEAT i := LOINDEX(csa) TO HIINDEX(csa);
    IF NOT ( csa[i].ref_quantity_property IN
    rcsc.ref_axis_type[i].ref_quantity_property
    ) THEN
    RETURN (FALSE);
    END_IF;
    END_REPEAT;
    END_ALIAS;
    END_ALIAS;
    RETURN (TRUE);
    END_FUNCTION;
    *);
END_ENTITY;

ENTITY coordinate_system_alias
 SUBTYPE OF (
  object_alias
 );
 coordinate_system : coordinate_system ;
 identifier : ndt_name ;
UNIQUE
 si: effective_date,
     expiry_date,
     ref_naming_system,
     coordinate_system;
END_ENTITY;

ENTITY coordinate_system_axis
 ABSTRACT SUPERTYPE OF (ONEOF(
  general_coordinate_system_axis,
  measured_depth_system_axis,
  vertical_depth_system_axis,
  vertical_time_system_axis
 ))
 SUBTYPE OF (
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 ref_axis_orientation : OPTIONAL ref_axis_orientation ;
 ref_quantity_property : ref_quantity_property ;
INVERSE
 coordinate_system : BAG[0:1] OF coordinate_system FOR coordinate_system_axis ;
END_ENTITY;

ENTITY coordinate_transformation
 SUBTYPE OF (
  reference_behavior,
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 identifier : ndt_name ;
 ref_coordinate_transform_constraint : OPTIONAL ref_coordinate_transform_constraint ;
 coordinate_transformation_method : coordinate_transformation_method ;
 coordinate_transformation_aoi : OPTIONAL SET[0:?] OF earth_surface_feature ;
INVERSE
 applied_coordinate_transformation : SET[0:?] OF applied_coordinate_transformation FOR coordinate_transformation ;
 coordinate_transformation_value : SET[0:?] OF coordinate_transformation_value FOR coordinate_transformation ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY coordinate_transformation_activity
 SUBTYPE OF (
  activity
 );
 applied_coordinate_transformation : OPTIONAL applied_coordinate_transformation ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY coordinate_transformation_method
 SUBTYPE OF (
  reference_behavior,
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 identifier : ndt_name ;
 ref_coordinate_transformation : ref_coordinate_transformation ;
INVERSE
 coordinate_transformation : SET[0:?] OF coordinate_transformation FOR coordinate_transformation_method ;
 coordinate_transformation_parameter : SET[0:?] OF coordinate_transformation_parameter FOR coordinate_transformation_method ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY coordinate_transformation_parameter
 SUBTYPE OF (
  reference_behavior,
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 ref_coordinate_transformation_parameter : ref_coordinate_transformation_parameter ;
 coordinate_transformation_method : coordinate_transformation_method ;
INVERSE
 coordinate_transformation_value : SET[0:?] OF coordinate_transformation_value FOR coordinate_transformation_parameter ;
UNIQUE
 si: ref_coordinate_transformation_parameter,
     coordinate_transformation_method;
END_ENTITY;

ENTITY coordinate_transformation_value
 SUBTYPE OF (
  reference_behavior,
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 integer_value : OPTIONAL ndt_int4 ;
 location_value : OPTIONAL ndt_location ;
 quantity_value : OPTIONAL ndt_any_quantity ;
 real_value : OPTIONAL ndt_real4 ;
 string_value : OPTIONAL ndt_name ;
 coordinate_transformation : coordinate_transformation ;
 coordinate_transformation_parameter : coordinate_transformation_parameter ;
UNIQUE
 si: coordinate_transformation,
     coordinate_transformation_parameter;
WHERE
  val1 : exists (integer_value) xor (exists (location_value)
    xor (exists (quantity_value) xor (exists (real_value)
    xor (exists (string_value) ) ) ) );
END_ENTITY;

ENTITY core
 SUBTYPE OF (
  rock_sample
 );
 ref_diameter : OPTIONAL ref_diameter ;
 borehole_generation_run : OPTIONAL borehole_generation_run ;
 kind : OPTIONAL ref_core ;
 wireline_logging_pass : OPTIONAL wireline_logging_pass ;
INVERSE
 fluid_saturation_condition : SET[0:?] OF fluid_saturation_condition FOR core ;
 pty_permeability_axial_path : SET[0:?] OF pty_permeability_axial_path FOR core ;
 pty_volume_per_length : SET[0:?] OF pty_volume_per_length FOR core ;
 pty_geometry_2d_face : SET[0:?] OF pty_geometry_2d_face FOR core ;
 pty_diameter : SET[0:?] OF pty_diameter FOR core ;
 pty_magnetic_flux : SET[0:?] OF pty_magnetic_flux FOR core ;
 pty_displacement_velocity : SET[0:?] OF pty_displacement_velocity FOR core ;
 pty_capillary_transition_zone_height : SET[0:?] OF pty_capillary_transition_zone_height FOR core ;
 pty_conductivity : SET[0:?] OF pty_conductivity FOR core ;
 pty_effective_length_thickness_ratio : SET[0:?] OF pty_effective_length_thickness_ratio FOR core ;
 pty_mass_per_length : SET[0:?] OF pty_mass_per_length FOR core ;
 pty_permeability_transverse_path : SET[0:?] OF pty_permeability_transverse_path FOR core ;
 pty_porosity_length_ratio : SET[0:?] OF pty_porosity_length_ratio FOR core ;
 pty_geometry_1d_edge : SET[0:?] OF pty_geometry_1d_edge FOR core ;
 pty_geometry_3d_region : SET[0:?] OF pty_geometry_3d_region FOR core ;
 pty_geometry_2d_ring : SET[0:?] OF pty_geometry_2d_ring FOR core ;
 pty_geometry_3d_shell : SET[0:?] OF pty_geometry_3d_shell FOR core ;
 pty_axial_length : SET[0:?] OF pty_axial_length FOR core ;
 pty_fluid_show_quality : SET[0:?] OF pty_fluid_show_quality FOR core ;
 pty_geometry_3d_ring : SET[0:?] OF pty_geometry_3d_ring FOR core ;
 pty_geometry_3d_edge : SET[0:?] OF pty_geometry_3d_edge FOR core ;
 pty_capillary_pressure_curve : SET[0:?] OF pty_capillary_pressure_curve FOR core ;
 pty_hydrocarbon_pore_volume : SET[0:?] OF pty_hydrocarbon_pore_volume FOR core ;
 pty_area_per_mass : SET[0:?] OF pty_area_per_mass FOR core ;
 pty_recovery_percent : SET[0:?] OF pty_recovery_percent FOR core ;
UNIQUE
 si: identifier,
     ref_existence_kind,
     borehole_generation_run,
     produced_by_activity,
     source_activity,
     wireline_logging_pass;
END_ENTITY;

ENTITY core_bit
 SUBTYPE OF (
  wellbore_device
 );
 inner_diameter : OPTIONAL ndt_length_diameter ;
UNIQUE
 si: identifier,
     wellbore,
     belongs_to_assembly,
     ref_existence_kind;
END_ENTITY;

ENTITY crossover_nipple
 SUBTYPE OF (
  wellbore_tubular
 );
 smaller_inner_diameter : OPTIONAL ndt_length_diameter ;
 smaller_outer_diameter : OPTIONAL ndt_length_diameter ;
UNIQUE
 si: ref_existence_kind,
     belongs_to_assembly,
     identifier,
     wellbore;
END_ENTITY;

ENTITY curve_fit_activity
 SUBTYPE OF (
  activity
 );
 diagram_specification : OPTIONAL diagram_specification ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY curved_text_element
 SUBTYPE OF (
  line_element
 );
 text_string : ndt_text ;
 text_style_type : text_style_type ;
END_ENTITY;

ENTITY damage_area
 SUBTYPE OF (
  business_object,
  earth_surface_area
 );
 identifier : OPTIONAL ndt_name ;
 incident_of_noncompliance : OPTIONAL incident_of_noncompliance ;
INVERSE
 property_damage : SET[0:?] OF property_damage FOR damage_area ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY data_collection
 SUBTYPE OF (
  e_and_p_data,
  process_data
 );
 name : OPTIONAL ndt_name ;
 ref_data_collection_type : OPTIONAL ref_data_collection_type ;
 process_parameter : OPTIONAL process_parameter ;
 populated_by : OPTIONAL activity ;
 updated_by : OPTIONAL activity ;
 business_associate : OPTIONAL business_associate ;
 reference_data : OPTIONAL SET[0:?] OF ref_data ;
 collection_content : OPTIONAL SET[0:?] OF e_and_p_data ;
 document_specification : OPTIONAL document_specification ;
INVERSE
 specify_contents_of : SET[0:?] OF document_specification FOR information_content ;
UNIQUE
 si: name,
     ref_data_collection_type,
     activity;
WHERE
  dri : not (self in data_collection);
  sri : process_parameter.typical_activity :=: activity.typical_activity;
  ose : (exists (updated_by) xor exists (populated_by))
    xor not((updated_by)  or exists (populated_by));
END_ENTITY;

ENTITY data_trace
 ABSTRACT SUPERTYPE OF (ONEOF(
  synthetic_log_trace,
  well_log_trace,
  well_test_trace
 ))
 SUBTYPE OF (
  grid_element_behavior,
  technical_object
 );
 identifier : OPTIONAL ndt_name ;
 trace_value : OPTIONAL ndt_trace_value ;
INVERSE
 well_log_trace_classification : SET[0:?] OF well_log_trace_classification FOR data_trace ;
END_ENTITY;

ENTITY decline_analysis
 SUBTYPE OF (
  production_activity
 );
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY depository_designation
 SUBTYPE OF (
  contract_designation
 );
 account_number : OPTIONAL ndt_comment ;
 depository_designation : OPTIONAL depository_designation ;
INVERSE
 alternate : SET[0:?] OF depository_designation FOR depository_designation ;
END_ENTITY;

ENTITY derived_interest_makeup
 SUBTYPE OF (
  transient_association
 );
 fraction : OPTIONAL ndt_pfrac_le_1 ;
 basis : OPTIONAL SET[0:?] OF contract_designation ;
 interest_for : business_object ;
 interest_of : business_associate ;
UNIQUE
 si: end_time,
     start_time,
     interest_for,
     interest_of;
END_ENTITY;

ENTITY derrick_floor_reference
 SUBTYPE OF (
  wellbore_reference
 );
UNIQUE
 si: identifier,
     ref_existence_kind,
     wellbore,
     belongs_to_assembly;
END_ENTITY;

ENTITY diagram_specification
 SUBTYPE OF (
  document_specification
 );
INVERSE
 curve_fit_activity : SET[0:?] OF curve_fit_activity FOR diagram_specification ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY digital_storage_facility
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: ref_existence_kind,
     name,
     identifying_facility;
END_ENTITY;

ENTITY digitize_document
 SUBTYPE OF (
  activity
 );
 source_document : OPTIONAL document ;
INVERSE
 well_log_trace : SET[0:?] OF well_log_trace FOR digitize_document ;
 electronic_document : SET[0:?] OF electronic_document FOR digitize_document ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity,
     source_document;
END_ENTITY;

ENTITY directional_survey_analysis
 SUBTYPE OF (
  activity
 );
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY discovery_area
 SUBTYPE OF (
  business_object,
  earth_surface_feature,
  product_flow_network_unit
 );
 application_date : OPTIONAL ndt_date ;
 declaration_date : OPTIONAL ndt_date ;
 effective_date : OPTIONAL ndt_date ;
 expiry_date : OPTIONAL ndt_date ;
 ref_discovery_area : OPTIONAL ref_discovery_area ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY divestment_package
 SUBTYPE OF (
  business_object
 );
 closing_date : OPTIONAL ndt_date ;
 name : ndt_name ;
 ref_sale : OPTIONAL ref_sale ;
 response_due_date : OPTIONAL ndt_date ;
 sale_date : OPTIONAL ndt_date ;
 sale_effective_date : OPTIONAL ndt_date ;
 sale_offer_date : OPTIONAL ndt_date ;
 SELF\business_object.subject_of_contract : OPTIONAL SET[0:?] OF marketing_agreement ;
 general_land_right : OPTIONAL SET[0:?] OF general_land_right ;
 equipment_item : OPTIONAL SET[0:?] OF equipment_item ;
 part_of : OPTIONAL divestment_package ;
INVERSE
 composed_of : SET[0:?] OF divestment_package FOR part_of ;
UNIQUE
 si: name;
END_ENTITY;

ENTITY document
 ABSTRACT SUPERTYPE OF (ONEOF(
  electronic_document,
  hardcopy_document
 ))
 SUBTYPE OF (
  inventory_object
 );
 document_specification : document_specification ;
 render_document : OPTIONAL render_document ;
INVERSE
 source_activity : SET[0:?] OF digitize_document FOR source_document ;
 document_circulation : SET[0:?] OF document_circulation FOR document ;
 geoscience_interpretation : SET[0:?] OF geoscience_interpretation FOR document ;
END_ENTITY;

ENTITY document_circulation
 SUBTYPE OF (
  activity
 );
 document : document ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity,
     document;
END_ENTITY;

ENTITY document_spec_class_classification
 SUBTYPE OF (
  reference_behavior,
  transient_association
 );
 have_as_a_member : document_specification_class ;
 be_classified_as : document_specification_class ;
UNIQUE
 si: have_as_a_member,
     be_classified_as,
     start_time,
     end_time;
WHERE
  val1 : have_as_a_member<>be_classified_as;
END_ENTITY;

ENTITY document_specification
 ABSTRACT SUPERTYPE OF (ONEOF(
  application_for_permit,
  contract_clause_set,
  diagram_specification,
  guideline_set,
  limitation_set,
  map,
  notification,
  other_document_specification,
  permit_specification,
  photographic_image,
  recorded_document_specification,
  regulation_set,
  report_specification,
  seismic_display,
  well_log
 ))
 SUBTYPE OF (
  business_object
 );
 description : OPTIONAL ndt_comment ;
 identifier : ndt_name ;
 compose_document_specification : OPTIONAL compose_document_specification ;
 information_content : OPTIONAL data_collection ;
 typical_document_specification : OPTIONAL typical_document_specification ;
INVERSE
 be_positioned_by : SET[0:?] OF document_specification_placement FOR placement_of ;
 document : SET[0:?] OF document FOR document_specification ;
 render_document : SET[0:?] OF render_document FOR document_specification ;
 graphical_composition : SET[0:?] OF graphical_element FOR document_specification ;
 placement_of : SET[0:?] OF document_specification_placement FOR place_within ;
 be_used_by : SET[0:?] OF data_collection FOR document_specification ;
 document_specification_classification : SET[0:?] OF document_specification_classification FOR document_specification ;
END_ENTITY;

ENTITY document_specification_class
 SUBTYPE OF (
  classification_class
 );
INVERSE
 document_specification_classification : SET[0:?] OF document_specification_classification FOR document_specification_class ;
 be_a_member_of : SET[0:?] OF document_spec_class_classification FOR have_as_a_member ;
 classify : SET[0:?] OF document_spec_class_classification FOR be_classified_as ;
UNIQUE
 si: classification_system,
     name;
END_ENTITY;

ENTITY document_specification_classification
 SUBTYPE OF (
  transient_association
 );
 document_specification : document_specification ;
 document_specification_class : document_specification_class ;
UNIQUE
 si: start_time,
     end_time,
     document_specification,
     document_specification_class;
END_ENTITY;

ENTITY document_specification_placement
 SUBTYPE OF (
  association
 );
 axis_rotation_angle : OPTIONAL ndt_plane_angle ;
 x_offset : OPTIONAL ndt_real4 ;
 x_scale : OPTIONAL ndt_real4 ;
 y_offset : OPTIONAL ndt_real4 ;
 y_scale : OPTIONAL ndt_real4 ;
 place_within : document_specification ;
 placement_of : document_specification ;
UNIQUE
 si: place_within,
     placement_of;
END_ENTITY;

ENTITY dominion_land_legal_survey_area
 SUBTYPE OF (
  legal_survey_area
 );
 meridian : OPTIONAL ndt_name ;
 range : OPTIONAL ndt_pint1 ;
 range_modifier : OPTIONAL ndt_code1 ;
 ref_east_or_west : OPTIONAL ref_east_or_west ;
 subdivision : OPTIONAL ndt_pint1 ;
 township : OPTIONAL ndt_pint1 ;
 township_modifier : OPTIONAL ndt_code1 ;
 township_range_section : OPTIONAL ndt_pint1 ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY downhole_choke
 SUBTYPE OF (
  wellbore_device
 );
 choke_diameter : OPTIONAL ndt_length_diameter ;
UNIQUE
 si: identifier,
     wellbore,
     belongs_to_assembly,
     ref_existence_kind;
END_ENTITY;

ENTITY downhole_motor
 SUBTYPE OF (
  wellbore_device
 );
 bit_pressure : OPTIONAL ndt_pressure ;
 bent_housing_angle : OPTIONAL ndt_plane_angle ;
 bend_and_align_makeup_torque : OPTIONAL ndt_torque ;
 high_flow : OPTIONAL ndt_flow_rate_volume_basis ;
 lobes : OPTIONAL ndt_pint1 ;
 makeup_torque : OPTIONAL ndt_torque ;
 max_bit_speed : OPTIONAL ndt_rotational_frequency ;
 maximum_differential_pressure : OPTIONAL ndt_pressure ;
 maximum_power : OPTIONAL ndt_power ;
 maximum_pump_rate : OPTIONAL ndt_flow_rate_volume_basis ;
 maximum_torque : OPTIONAL ndt_torque ;
 minimum_bit_speed : OPTIONAL ndt_rotational_frequency ;
 minimum_power : OPTIONAL ndt_power ;
 minimum_pump_rate : OPTIONAL ndt_flow_rate_volume_basis ;
 operating_pressure : OPTIONAL ndt_pressure ;
 operating_torque : OPTIONAL ndt_torque ;
 stages : OPTIONAL ndt_name ;
 tool_size : OPTIONAL ref_diameter ;
 top_angle : OPTIONAL ndt_plane_angle ;
 weight : OPTIONAL ndt_mass ;
UNIQUE
 si: ref_existence_kind,
     wellbore,
     identifier,
     belongs_to_assembly;
END_ENTITY;

ENTITY downhole_pressure_sensor
 SUBTYPE OF (
  downhole_sensor
 );
UNIQUE
 si: ref_existence_kind,
     wellbore,
     identifier,
     belongs_to_assembly;
END_ENTITY;

ENTITY downhole_pump
 SUBTYPE OF (
  wellbore_device
 );
UNIQUE
 si: identifier,
     wellbore,
     belongs_to_assembly,
     ref_existence_kind;
END_ENTITY;

ENTITY downhole_rate_sensor
 SUBTYPE OF (
  downhole_sensor
 );
UNIQUE
 si: ref_existence_kind,
     wellbore,
     identifier,
     belongs_to_assembly;
END_ENTITY;

ENTITY downhole_sensor
 SUPERTYPE OF (ONEOF(
  downhole_pressure_sensor,
  downhole_rate_sensor,
  downhole_temperature_sensor,
  drill_measurement_tool
 ))
 SUBTYPE OF (
  wellbore_device
 );
 maximum_working_pressure : OPTIONAL ndt_pressure ;
END_ENTITY;

ENTITY downhole_temperature_sensor
 SUBTYPE OF (
  downhole_sensor
 );
 internal_yield_pressure : OPTIONAL ndt_pressure ;
UNIQUE
 si: ref_existence_kind,
     identifier,
     wellbore,
     belongs_to_assembly;
END_ENTITY;

ENTITY drill_bit
 SUBTYPE OF (
  wellbore_device
 );
UNIQUE
 si: ref_existence_kind,
     wellbore,
     identifier,
     belongs_to_assembly;
END_ENTITY;

ENTITY drill_borehole
 SUBTYPE OF (
  wellbore_activity
 );
INVERSE
 single_diameter_borehole : SET[0:?] OF single_diameter_borehole_segment FOR drill_borehole ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     wellbore,
     containing_activity;
END_ENTITY;

ENTITY drill_collar
 SUBTYPE OF (
  wellbore_device
 );
UNIQUE
 si: ref_existence_kind,
     identifier,
     belongs_to_assembly,
     wellbore;
END_ENTITY;

ENTITY drill_cuttings_sample
 SUBTYPE OF (
  rock_sample
 );
 borehole_generation_run : OPTIONAL borehole_generation_run ;
INVERSE
 fluid_saturation_condition : SET[0:?] OF fluid_saturation_condition FOR drill_cuttings_sample ;
 pty_spore_color : SET[0:?] OF pty_spore_color FOR drill_cuttings_sample ;
 pty_fluid_show_quality : SET[0:?] OF pty_fluid_show_quality FOR drill_cuttings_sample ;
 pty_conodont_color : SET[0:?] OF pty_conodont_color FOR drill_cuttings_sample ;
 pty_area_per_mass : SET[0:?] OF pty_area_per_mass FOR drill_cuttings_sample ;
UNIQUE
 si: identifier,
     ref_existence_kind,
     produced_by_activity,
     source_activity;
END_ENTITY;

ENTITY drill_measurement_tool
 SUBTYPE OF (
  downhole_sensor
 );
UNIQUE
 si: identifier,
     wellbore,
     belongs_to_assembly,
     ref_existence_kind;
END_ENTITY;

ENTITY drill_pipe_joint
 SUBTYPE OF (
  wellbore_device
 );
UNIQUE
 si: ref_existence_kind,
     identifier,
     wellbore,
     belongs_to_assembly;
END_ENTITY;

ENTITY drilling_derrick_system
 SUBTYPE OF (
  general_facility
 );
 design : OPTIONAL ndt_comment ;
UNIQUE
 si: name,
     ref_existence_kind,
     identifying_facility;
END_ENTITY;

ENTITY drilling_facility
 SUBTYPE OF (
  general_facility
 );
INVERSE
 pty_sea_state : SET[0:?] OF pty_sea_state FOR drilling_facility ;
 pty_wind_state : SET[0:?] OF pty_wind_state FOR drilling_facility ;
UNIQUE
 si: name,
     ref_existence_kind,
     identifying_facility;
END_ENTITY;

ENTITY drilling_jar
 SUBTYPE OF (
  wellbore_device
 );
UNIQUE
 si: ref_existence_kind,
     belongs_to_assembly,
     identifier,
     wellbore;
END_ENTITY;

ENTITY drilling_kick
 SUBTYPE OF (
  wellbore_activity
 );
 drilling_kick_fluid : OPTIONAL LIST[0:?] OF UNIQUE drilling_kick_fluid ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity,
     wellbore;
END_ENTITY;

ENTITY drilling_kick_fluid
 SUBTYPE OF (
  technical_object
 );
 drillstring : OPTIONAL drillstring ;
 fluid_phase : fluid_phase ;
INVERSE
 pty_length : SET[0:?] OF pty_length FOR drilling_kick_fluid ;
 drilling_kick : drilling_kick FOR drilling_kick_fluid ;
 pty_mass : SET[0:?] OF pty_mass FOR drilling_kick_fluid ;
 pty_flow_rate_mass_basis : SET[0:?] OF pty_flow_rate_mass_basis FOR drilling_kick_fluid ;
 pty_flow_rate_volume_basis : SET[0:?] OF pty_flow_rate_volume_basis FOR drilling_kick_fluid ;
 pty_volume : SET[0:?] OF pty_bulk_volume_total FOR drilling_kick_fluid ;
UNIQUE
 si: drilling_kick,
     fluid_phase;
END_ENTITY;

ENTITY drilling_permit
 SUBTYPE OF (
  permit_specification
 );
UNIQUE
 si: identifier,
     issued_by;
END_ENTITY;

ENTITY drilling_rig
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     identifying_facility,
     ref_existence_kind;
END_ENTITY;

ENTITY drillstem_test
 SUBTYPE OF (
  wellbore_activity
 );
 temporary_completion : OPTIONAL temporary_completion ;
INVERSE
 drillstem_test_recovery : SET[0:?] OF drillstem_test_recovery FOR drillstem_test ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     wellbore,
     containing_activity;
END_ENTITY;

ENTITY drillstem_test_recovery
 SUBTYPE OF (
  well_test_recovery
 );
 description : OPTIONAL ndt_comment ;
 drillstem_test : drillstem_test ;
UNIQUE
 si: drillstem_test,
     reservoir_fluid_system,
     identifier;
END_ENTITY;

ENTITY drillstring
 SUBTYPE OF (
  wellbore_tubular
 );
INVERSE
 drilling_kick_fluid : SET[0:?] OF drilling_kick_fluid FOR drillstring ;
UNIQUE
 si: identifier,
     ref_existence_kind,
     wellbore,
     belongs_to_assembly;
END_ENTITY;

ENTITY drillstring_segment
 SUBTYPE OF (
  wellbore_tubular
 );
UNIQUE
 si: ref_existence_kind,
     belongs_to_assembly,
     identifier,
     wellbore;
END_ENTITY;

ENTITY drillstring_stabilizer
 SUBTYPE OF (
  wellbore_device
 );
 inner_diameter : OPTIONAL ndt_length_diameter ;
 blade_diameter : OPTIONAL ndt_length_diameter ;
UNIQUE
 si: identifier,
     wellbore,
     belongs_to_assembly,
     ref_existence_kind;
END_ENTITY;

ENTITY dynamic_graphical_element
 SUBTYPE OF (
  graphical_element
 );
 predicate_type : predicate_type ;
INVERSE
 utilize_parameter : SET[0:?] OF parameter_value FOR used_by_element ;
UNIQUE
 si: identifier,
     predicate_type,
     document_specification,
     depicted_object;
END_ENTITY;

ENTITY dynamic_positioning_system
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     ref_existence_kind,
     identifying_facility;
END_ENTITY;

ENTITY e_and_p_data
 ABSTRACT SUPERTYPE OF (ONEOF(
  activity,
  association,
  data_collection,
  geologic_process,
  object_of_interest,
  property
 ));
INVERSE
 data_collection : SET[0:?] OF data_collection FOR collection_content ;
 graphical_element : SET[0:?] OF graphical_element FOR depicted_object ;
END_ENTITY;

ENTITY earth_model
 SUBTYPE OF (
  technical_object
 );
 identifier : ndt_name ;
 geoscience_interpretation : OPTIONAL geoscience_interpretation ;
 spatial_object : OPTIONAL SET[0:?] OF spatial_object ;
UNIQUE
 si: identifier,
     geoscience_interpretation;
END_ENTITY;

ENTITY earth_model_object
 ABSTRACT SUPERTYPE OF (ONEOF(
  position_in_earth_model,
  position_in_wellbore,
  position_on_earth_surface
 ))
 SUBTYPE OF (
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 identifier : OPTIONAL ndt_name ;
 geoscience_interpretation : OPTIONAL geoscience_interpretation ;
 rock_feature_part : OPTIONAL rock_feature_part ;
INVERSE
 position_uncertainty_classification : SET[0:?] OF position_uncertainty_classification FOR earth_model_object ;
END_ENTITY;

ENTITY earth_point
 ABSTRACT SUPERTYPE OF (ONEOF(
  earth_position_vertex,
  earth_surface_point,
  wellbore_point
 ))
 SUBTYPE OF (
  vertex
 );
INVERSE
 vertical_datum_offset : SET[0:?] OF vertical_datum_offset FOR earth_point ;
 pty_magnetic_inclination : SET[0:?] OF pty_magnetic_inclination FOR earth_point ;
 local_vertical_datum : SET[0:?] OF local_vertical_datum FOR earth_point ;
END_ENTITY;

ENTITY earth_position_composite
 SUBTYPE OF (
  composite_spatial_object,
  position_in_earth_model
 );
 part : OPTIONAL SET[0:?] OF position_in_earth_model ;
INVERSE
 identify_part : SET[0:?] OF earth_position_simple FOR identifying_whole ;
UNIQUE
 si: identifier,
     geologic_feature,
     geoscience_interpretation;
END_ENTITY;

ENTITY earth_position_edge
 SUBTYPE OF (
  earth_position_simple,
  edge
 );
UNIQUE
 si: identifier,
     identifying_whole,
     seismic_geometry_set,
     geologic_feature,
     geoscience_interpretation;
END_ENTITY;

ENTITY earth_position_face
 SUBTYPE OF (
  earth_position_simple,
  face
 );
INVERSE
 pty_inclination_from_vertical : SET[0:?] OF pty_inclination_from_vertical FOR earth_position_face ;
 pty_azimuth : SET[0:?] OF pty_azimuth FOR earth_position_face ;
 pty_fault_separation : SET[0:?] OF pty_fault_separation FOR earth_position_face ;
 pty_fault_slip_variable : SET[0:?] OF pty_fault_slip_variable FOR earth_position_face ;
 pty_fault_slip : SET[0:?] OF pty_fault_slip FOR earth_position_face ;
 fault_plane_orientation : SET[0:?] OF fault_plane_orientation FOR earth_position_face ;
UNIQUE
 si: identifier,
     identifying_whole,
     seismic_geometry_set,
     geologic_feature,
     geoscience_interpretation;
END_ENTITY;

ENTITY earth_position_region
 SUBTYPE OF (
  earth_position_simple,
  region
 );
INVERSE
 fault_plane_orientation : SET[0:?] OF fault_plane_orientation FOR earth_position_region ;
UNIQUE
 si: identifier,
     identifying_whole,
     seismic_geometry_set,
     geologic_feature,
     geoscience_interpretation;
END_ENTITY;

ENTITY earth_position_ring
 SUBTYPE OF (
  earth_position_simple,
  ring
 );
UNIQUE
 si: identifier,
     identifying_whole,
     seismic_geometry_set,
     geologic_feature,
     geoscience_interpretation;
END_ENTITY;

ENTITY earth_position_shell
 SUBTYPE OF (
  earth_position_simple,
  shell
 );
UNIQUE
 si: identifier,
     identifying_whole,
     seismic_geometry_set,
     geologic_feature,
     geoscience_interpretation;
END_ENTITY;

ENTITY earth_position_simple
 ABSTRACT SUPERTYPE OF (ONEOF(
  earth_position_edge,
  earth_position_face,
  earth_position_region,
  earth_position_ring,
  earth_position_shell,
  earth_position_vertex
 ))
 SUBTYPE OF (
  position_in_earth_model
 );
 identifying_whole : OPTIONAL earth_position_composite ;
 seismic_geometry_set : OPTIONAL seismic_geometry_set ;
WHERE
  sri : identifying_whole <=  whole;
  ose : exists (identifying_whole) xor exists (geologic_feature)
    xor not (exists (identifying_whole) or exists (geologic_feature));
  val1 : (exists (seismic_geometry_set) and exists (geologic_feature) )
    or not (exists (seismic_geometry_set) or exists (geologic_feature) );
END_ENTITY;

ENTITY earth_position_vertex
 SUBTYPE OF (
  earth_point,
  earth_position_simple
 );
INVERSE
 pty_location_3d : SET[0:?] OF pty_location_3d FOR earth_position_vertex ;
 pty_location_2d : SET[0:?] OF pty_location_2d FOR earth_position_vertex ;
 pty_location_1d : SET[0:?] OF pty_location_1d FOR earth_position_vertex ;
UNIQUE
 si: identifier,
     identifying_whole,
     seismic_geometry_set,
     geologic_feature,
     geoscience_interpretation;
END_ENTITY;

ENTITY earth_surface_area
 ABSTRACT SUPERTYPE OF (ONEOF(
  damage_area,
  general_surface_area,
  land_property_parcel,
  legal_survey_area,
  unitized_land_parcel_area
 ))
 SUBTYPE OF (
  face
 );
INVERSE
 inner_boundary_geometry : SET[0:?] OF pty_geometry_2d_ring FOR inner_surface_face ;
 outer_boundary_geometry : SET[0:?] OF pty_geometry_2d_ring FOR outer_surface_face ;
 map : SET[0:?] OF map FOR earth_surface_area ;
END_ENTITY;

ENTITY earth_surface_boundary
 ABSTRACT SUPERTYPE OF (ONEOF(
  general_surface_boundary,
  land_property_boundary,
  legal_survey_boundary
 ))
 SUBTYPE OF (
  ring
 );
END_ENTITY;

ENTITY earth_surface_feature
 ABSTRACT SUPERTYPE OF (ONEOF(
  discovery_area,
  field,
  geodetic_zone,
  geographic_feature,
  geologic_province,
  geophysical_acquisition_area,
  geopolitical_feature,
  magnetic_polarity_zone,
  outcrop,
  regulatory_area
 ));
 description : OPTIONAL ndt_comment ;
 ref_naming_system : OPTIONAL ref_naming_system ;
 position_on_earth_surface : OPTIONAL SET[0:?] OF position_on_earth_surface ;
 identifier : ndt_long_name ;
INVERSE
 coordinate_transformation : SET[0:?] OF coordinate_transformation FOR coordinate_transformation_aoi ;
 coordinate_system : SET[0:?] OF coordinate_system FOR earth_surface_feature ;
 synthetic_log_trace : SET[0:?] OF synthetic_log_trace FOR earth_surface_feature ;
 earth_surface_feature_alias : SET[0:?] OF earth_surface_feature_alias FOR earth_surface_feature ;
 well_surface_feature_role : SET[0:?] OF well_surface_feature_role FOR earth_surface_feature ;
 well_log : SET[0:?] OF well_log FOR earth_surface_feature ;
 business_associate_land_feature_role : SET[0:?] OF business_associate_land_feature_role FOR earth_surface_feature ;
 pty_geothermal_gradient : SET[0:?] OF pty_geothermal_gradient FOR earth_surface_feature ;
 pty_area : SET[0:?] OF pty_area FOR earth_surface_feature ;
 pty_population : SET[0:?] OF pty_population FOR earth_surface_feature ;
 pty_population_density : SET[0:?] OF pty_population_density FOR earth_surface_feature ;
 pty_average_earth_surface_elevation : SET[0:?] OF pty_average_earth_surface_elevation FOR earth_surface_feature ;
 local_rock_feature : SET[0:?] OF local_rock_feature FOR earth_surface_feature ;
END_ENTITY;

ENTITY earth_surface_feature_alias
 SUBTYPE OF (
  object_alias,
  reference_behavior
 );
 earth_surface_feature : earth_surface_feature ;
 identifier : ndt_long_name ;
UNIQUE
 si: effective_date,
     expiry_date,
     ref_naming_system,
     earth_surface_feature;
END_ENTITY;

ENTITY earth_surface_line
 ABSTRACT SUPERTYPE OF (ONEOF(
  general_surface_line,
  legal_survey_line
 ))
 SUBTYPE OF (
  edge
 );
END_ENTITY;

ENTITY earth_surface_point
 ABSTRACT SUPERTYPE OF (ONEOF(
  facility_reference_point,
  general_earth_surface_point,
  legal_survey_point,
  seismic_acquisition_vertex,
  seismic_facility_node,
  seismic_processing_vertex,
  well_surface_point
 ))
 SUBTYPE OF (
  earth_point
 );
INVERSE
 observed_baseline : SET[0:?] OF observation_definition FOR baseline_node ;
 observed_reference : SET[0:?] OF observation_definition FOR reference_node ;
 pty_magnetic_declination : SET[0:?] OF pty_magnetic_declination FOR earth_surface_point ;
END_ENTITY;

ENTITY edge
 ABSTRACT SUPERTYPE OF (ONEOF(
  earth_position_edge,
  earth_surface_line,
  line_element,
  other_edge,
  wellbore,
  wellbore_interval
 ))
 SUBTYPE OF (
  simple_spatial_object
 );
 ring : OPTIONAL SET[0:?] OF ring ;
 vertex : OPTIONAL SET[0:2] OF vertex ;
INVERSE
 pty_geometry_1d_edge : SET[0:?] OF pty_geometry_1d_edge FOR edge ;
 pty_geometry_2d_edge : SET[0:?] OF pty_geometry_2d_edge FOR edge ;
 pty_geometry_3d_edge : SET[0:?] OF pty_geometry_3d_edge FOR edge ;
 pty_length : SET[0:?] OF pty_length FOR edge ;
END_ENTITY;

ENTITY electrical_battery
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     identifying_facility,
     ref_existence_kind;
END_ENTITY;

ENTITY electronic_document
 SUBTYPE OF (
  document
 );
 ref_digital_file_format : ref_digital_file_format ;
 digitize_document : OPTIONAL digitize_document ;
UNIQUE
 si: identifier,
     ref_digital_file_format,
     document_specification;
END_ENTITY;

ENTITY ellipsoid
 SUBTYPE OF (
  reference_behavior,
  technical_object
 );
 identifier : ndt_name ;
 inverse_flattening : OPTIONAL ndt_real4 ;
 ref_naming_system : OPTIONAL ref_naming_system ;
 semimajor_axis : OPTIONAL ndt_accurate_length ;
 semiminor_axis : OPTIONAL ndt_accurate_length ;
 description : OPTIONAL ndt_comment ;
INVERSE
 ellipsoid_alias : SET[0:?] OF ellipsoid_alias FOR ellipsoid ;
 geodetic_datum : SET[0:?] OF geodetic_datum FOR ellipsoid ;
UNIQUE
 si: identifier;
WHERE
  val : (exists (semimajor_axis) and
    (exists (semiminor_axis) xor exists (inverse_flattening)));
END_ENTITY;

ENTITY ellipsoid_alias
 SUBTYPE OF (
  object_alias
 );
 ellipsoid : ellipsoid ;
 identifier : ndt_name ;
UNIQUE
 si: effective_date,
     expiry_date,
     ref_naming_system,
     ellipsoid;
END_ENTITY;

ENTITY email_address
 SUBTYPE OF (
  address
 );
 data_value : ndt_address_email ;
UNIQUE
 si: data_value,
     effective_date,
     expiry_date,
     business_associate,
     facility;
END_ENTITY;

ENTITY encumbrance
 SUBTYPE OF (
  recorded_document_specification
 );
 discharge_date : OPTIONAL ndt_date_tod ;
 discharge_number : OPTIONAL ndt_name ;
 effective_date : OPTIONAL ndt_date ;
 contract : SET[1:?] OF contract ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY enlarged_diameter_borehole_segment
 SUBTYPE OF (
  borehole_component
 );
 ref_diameter : OPTIONAL ref_diameter ;
UNIQUE
 si: identifier,
     ref_existence_kind,
     wellbore,
     belongs_to_assembly;
END_ENTITY;

ENTITY equipment_calibration
 SUBTYPE OF (
  activity
 );
 object_of_calibration : SET[1:?] OF equipment_item ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY equipment_class
 SUBTYPE OF (
  classification_class
 );
INVERSE
 be_a_member_of : SET[0:?] OF equipment_class_classification FOR have_as_a_member ;
 equipment_item_members : SET[0:?] OF equipment_item_classification FOR equipment_class ;
 classify : SET[0:?] OF equipment_class_classification FOR be_classified_as ;
 catalog_equipment_members : SET[0:?] OF catalog_equipment_classification FOR equipment_class ;
 equipment_class_alias : SET[0:?] OF equipment_class_alias FOR equipment_class ;
UNIQUE
 si: name,
     classification_system;
END_ENTITY;

ENTITY equipment_class_alias
 SUBTYPE OF (
  reference_behavior,
  technical_object
 );
 classification_system : classification_system ;
 equipment_class : equipment_class ;
 name : ndt_long_name ;
UNIQUE
 si: classification_system,
     name,
     equipment_class;
END_ENTITY;

ENTITY equipment_class_classification
 SUBTYPE OF (
  reference_behavior,
  transient_association
 );
 be_classified_as : equipment_class ;
 have_as_a_member : equipment_class ;
UNIQUE
 si: end_time,
     start_time,
     be_classified_as,
     have_as_a_member;
END_ENTITY;

ENTITY equipment_composition
 ABSTRACT SUPERTYPE OF (ONEOF(
  catalog_item_assembly,
  catalog_item_collection,
  equipment_item_assembly,
  equipment_item_collection
 ))
 SUBTYPE OF (
  transient_association
 );
 whole : equipment_item ;
END_ENTITY;

ENTITY equipment_fulfillment
 SUBTYPE OF (
  association
 );
 fulfillment : equipment_item ;
 fulfill : equipment_item ;
UNIQUE
 si: fulfillment,
     fulfill;
END_ENTITY;

ENTITY equipment_installation
 ABSTRACT SUPERTYPE OF (ONEOF(
  catalog_equipment_installation,
  equipment_item_installation
 ))
 SUBTYPE OF (
  transient_association
 );
 facility : facility ;
END_ENTITY;

ENTITY equipment_item
 SUBTYPE OF (
  inventory_object
 );
 description : OPTIONAL ndt_comment ;
 ref_existence_kind : ref_existence_kind ;
 catalog_equipment : OPTIONAL catalog_equipment ;
INVERSE
 divestment_package : SET[0:?] OF divestment_package FOR equipment_item ;
 property_damage : SET[0:?] OF property_damage FOR equipment_item ;
 equipment_item_classification : SET[0:?] OF equipment_item_classification FOR equipment_item ;
 connected_from : SET[0:?] OF equipment_item_connection FOR from_equipment ;
 connected_to : SET[0:?] OF equipment_item_connection FOR to_equipment ;
 calibrated_by_activity : SET[0:?] OF equipment_calibration FOR object_of_calibration ;
 equipment_repair_job : SET[0:?] OF equipment_repair_job FOR equipment_item ;
 equipment_item_collection : SET[0:?] OF equipment_item_collection FOR part ;
 composed_of : SET[0:?] OF equipment_composition FOR whole ;
 utilized_in_activity : SET[0:?] OF activity FOR utilize_equipment ;
 fulfillment : SET[0:?] OF equipment_fulfillment FOR fulfill ;
 fulfill : SET[0:?] OF equipment_fulfillment FOR fulfillment ;
 equipment_installation : SET[0:?] OF equipment_item_installation FOR equipment_item ;
 pty_equipment_facility : SET[0:?] OF pty_equipment_facility FOR equipment_item ;
 equipment_item_assembly : SET[0:?] OF equipment_item_assembly FOR part ;
UNIQUE
 si: identifier,
     ref_existence_kind,
     catalog_equipment;
END_ENTITY;

ENTITY equipment_item_assembly
 SUBTYPE OF (
  equipment_composition
 );
 part : equipment_item ;
UNIQUE
 si: end_time,
     start_time,
     part,
     whole;
WHERE
  val1 : whole:<>:part;
END_ENTITY;

ENTITY equipment_item_classification
 SUBTYPE OF (
  transient_association
 );
 equipment_class : equipment_class ;
 equipment_item : equipment_item ;
UNIQUE
 si: end_time,
     start_time,
     equipment_class,
     equipment_item;
END_ENTITY;

ENTITY equipment_item_collection
 SUBTYPE OF (
  equipment_composition
 );
 part : equipment_item ;
UNIQUE
 si: end_time,
     start_time,
     part,
     whole;
WHERE
  val1 : whole:<>:part;
END_ENTITY;

ENTITY equipment_item_connection
 SUBTYPE OF (
  transient_association
 );
 from_equipment : equipment_item ;
 to_equipment : equipment_item ;
UNIQUE
 si: end_time,
     start_time,
     from_equipment,
     to_equipment;
WHERE
  val1 : to_equipment:<>:from_equipment;
END_ENTITY;

ENTITY equipment_item_installation
 SUBTYPE OF (
  equipment_installation
 );
 equipment_item : equipment_item ;
UNIQUE
 si: end_time,
     start_time,
     facility,
     equipment_item;
END_ENTITY;

ENTITY equipment_repair_job
 SUBTYPE OF (
  activity
 );
 equipment_item : equipment_item ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY european_legal_survey_area
 SUBTYPE OF (
  legal_survey_area
 );
 block_number : OPTIONAL ndt_pint1 ;
 block_suffix : OPTIONAL ndt_code2 ;
 principal_meridian : OPTIONAL ndt_name ;
 quadrant : OPTIONAL ndt_pint1 ;
 quadrant_prefix : OPTIONAL ndt_code2 ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY evaluated_flow_stream
 SUBTYPE OF (
  fluid_flow_stream
 );
 identifier : OPTIONAL ndt_name ;
 kind : OPTIONAL ref_evaluated_flow_stream ;
 fluid_component : OPTIONAL fluid_component ;
 fluid_phase : OPTIONAL fluid_phase ;
INVERSE
 pty_fluid_component_ratio : SET[0:?] OF pty_fluid_component_ratio FOR evaluated_flow_stream ;
 pty_fluid_phase_ratio : SET[0:?] OF pty_fluid_phase_ratio FOR evaluated_flow_stream ;
 pty_standard_volume_gas : SET[0:?] OF pty_standard_volume_gas FOR evaluated_flow_stream ;
 pty_standard_volume_gas_rate : SET[0:?] OF pty_standard_volume_gas_rate FOR evaluated_flow_stream ;
 pty_standard_volume_liquid : SET[0:?] OF pty_standard_volume_liquid FOR evaluated_flow_stream ;
 pty_standard_volume_liquid_rate : SET[0:?] OF pty_standard_volume_liquid_rate FOR evaluated_flow_stream ;
 pty_inflow_performance_ratio : SET[0:?] OF pty_inflow_performance_ratio FOR evaluated_flow_stream ;
UNIQUE
 si: identifier,
     kind,
     product_flow_network_unit_port,
     fluid_phase,
     fluid_component;
WHERE
  val1 : exists (fluid_component) or exists (fluid_phase);
END_ENTITY;

ENTITY expansion_joint
 SUBTYPE OF (
  wellbore_tubular
 );
UNIQUE
 si: ref_existence_kind,
     belongs_to_assembly,
     identifier,
     wellbore;
END_ENTITY;

ENTITY face
 ABSTRACT SUPERTYPE OF (ONEOF(
  area_element,
  earth_position_face,
  earth_surface_area,
  other_face,
  vertical_datum,
  wellbore_face
 ))
 SUBTYPE OF (
  simple_spatial_object
 );
 shell : OPTIONAL SET[0:?] OF shell ;
 bounding_ring : OPTIONAL SET[0:?] OF ring ;
INVERSE
 pty_geometry_2d_face : SET[0:?] OF pty_geometry_2d_face FOR face ;
 pty_geometry_3d_face : SET[0:?] OF pty_geometry_3d_face FOR face ;
 pty_area : SET[0:?] OF pty_area FOR face ;
END_ENTITY;

ENTITY facility
 ABSTRACT SUPERTYPE OF (ONEOF(
  general_facility,
  observation_definition,
  product_flow_network_group,
  product_flow_network_unit_port,
  seismic_facility,
  well,
  well_completion,
  well_pattern,
  well_slot,
  wellbore,
  wellbore_component_facility
 ))
 SUBTYPE OF (
  business_object
 );
 description : OPTIONAL ndt_comment ;
 ref_existence_kind : ref_existence_kind ;
 typical_facility : OPTIONAL typical_facility ;
INVERSE
 property_damage : SET[0:?] OF property_damage FOR facility ;
 facility_classification : SET[0:?] OF facility_classification FOR facility ;
 fulfill : SET[0:?] OF facility_fulfillment FOR fulfillment ;
 fulfillment : SET[0:?] OF facility_fulfillment FOR fulfill ;
 part_of_facility : SET[0:?] OF facility_composition FOR part ;
 sample_acquisition : SET[0:?] OF sample_acquisition FOR site ;
 site_of_activity : SET[0:?] OF materials_processing FOR located_by_facility ;
 materials_characterization : SET[0:?] OF materials_characterization FOR site ;
 application_for_permit : SET[0:?] OF application_for_permit FOR facility ;
 equipment_installation : SET[0:?] OF equipment_installation FOR facility ;
 material_installation : SET[0:?] OF material_installation FOR facility ;
 business_associate_facility_association : SET[0:?] OF business_associate_facility_association FOR facility ;
 activity : SET[0:?] OF activity FOR facility ;
 address : SET[0:?] OF address FOR facility ;
END_ENTITY;

ENTITY facility_assembly
 SUBTYPE OF (
  facility_composition
 );
UNIQUE
 si: end_time,
     start_time,
     part,
     whole;
END_ENTITY;

ENTITY facility_class
 SUBTYPE OF (
  classification_class
 );
INVERSE
 classify : SET[0:?] OF facility_class_classification FOR be_classified_as ;
 typical_facility_members : SET[0:?] OF typical_facility_classification FOR facility_class ;
 facility_members : SET[0:?] OF facility_classification FOR facility_class ;
 be_a_member_of : SET[0:?] OF facility_class_classification FOR have_as_a_member ;
 facility_class_alias : SET[0:?] OF facility_class_alias FOR facility_class ;
UNIQUE
 si: name,
     classification_system;
END_ENTITY;

ENTITY facility_class_alias
 SUBTYPE OF (
  reference_behavior,
  technical_object
 );
 classification_system : classification_system ;
 facility_class : facility_class ;
 name : ndt_long_name ;
UNIQUE
 si: classification_system,
     name,
     facility_class;
END_ENTITY;

ENTITY facility_class_classification
 SUBTYPE OF (
  reference_behavior,
  transient_association
 );
 be_classified_as : facility_class ;
 have_as_a_member : facility_class ;
UNIQUE
 si: end_time,
     start_time,
     be_classified_as,
     have_as_a_member;
WHERE
  val1 : have_as_a_member<>be_classified_as;
END_ENTITY;

ENTITY facility_classification
 SUBTYPE OF (
  transient_association
 );
 facility_class : facility_class ;
 facility : facility ;
UNIQUE
 si: end_time,
     start_time,
     facility_class,
     facility;
END_ENTITY;

ENTITY facility_collection
 SUBTYPE OF (
  facility_composition
 );
UNIQUE
 si: end_time,
     start_time,
     part,
     whole;
END_ENTITY;

ENTITY facility_composition
 ABSTRACT SUPERTYPE OF (ONEOF(
  facility_assembly,
  facility_collection
 ))
 SUBTYPE OF (
  transient_association
 );
 part : facility ;
 whole : general_facility ;
WHERE
  val1 : part :<>: whole;
END_ENTITY;

ENTITY facility_connection
 SUBTYPE OF (
  transient_association
 );
 from_facility : general_facility ;
 to_facility : general_facility ;
UNIQUE
 si: end_time,
     start_time,
     from_facility,
     to_facility;
WHERE
  val1 : to_facility:<>:from_facility;
END_ENTITY;

ENTITY facility_fulfillment
 SUBTYPE OF (
  association
 );
 fulfillment : facility ;
 fulfill : facility ;
UNIQUE
 si: fulfillment,
     fulfill;
END_ENTITY;

ENTITY facility_reference_point
 SUBTYPE OF (
  earth_surface_point,
  general_facility
 );
 ref_facility_reference_point : OPTIONAL ref_facility_reference_point ;
INVERSE
 pty_location_2d : SET[0:?] OF pty_location_2d FOR facility_reference_point ;
 pty_location_1d : SET[0:?] OF pty_location_1d FOR facility_reference_point ;
 pty_legal_survey_location : SET[0:?] OF pty_legal_survey_location FOR facility_reference_point ;
UNIQUE
 si: name,
     ref_existence_kind,
     identifying_facility;
END_ENTITY;

ENTITY facility_version
 SUBTYPE OF (
  transient_association
 );
 original_facility : general_facility ;
 version_facility : general_facility ;
UNIQUE
 si: end_time,
     start_time,
     original_facility,
     version_facility;
WHERE
  val1 : original_facility:<>:version_facility;
END_ENTITY;

ENTITY fault_plane_orientation
 SUBTYPE OF (
  technical_object
 );
 ref_fault_side : ref_fault_side ;
 earth_position_face : OPTIONAL earth_position_face ;
 earth_position_region : OPTIONAL earth_position_region ;
UNIQUE
 si: ref_fault_side,
     earth_position_face;
END_ENTITY;

ENTITY feature_boundary
 ABSTRACT SUPERTYPE OF (ONEOF(
  feature_boundary_part,
  feature_boundary_undivided
 ))
 SUBTYPE OF (
  geologic_feature,
  technical_object
 );
 identifier : OPTIONAL ndt_name ;
INVERSE
 geologic_age_classification : SET[0:?] OF geologic_age_classification FOR feature_boundary ;
 boundary_classification : SET[0:?] OF boundary_classification FOR feature_boundary ;
 pty_geologic_age : SET[0:?] OF pty_geologic_age FOR feature_boundary ;
 pty_geologic_age_range : SET[0:?] OF pty_geologic_age_range FOR feature_boundary ;
 feature_boundary_part : SET[0:?] OF feature_boundary_part FOR feature_boundary ;
END_ENTITY;

ENTITY feature_boundary_part
 SUBTYPE OF (
  feature_boundary
 );
 feature_boundary : OPTIONAL feature_boundary ;
UNIQUE
 si: identifier,
     feature_boundary;
END_ENTITY;

ENTITY feature_boundary_undivided
 ABSTRACT SUPERTYPE OF (ONEOF(
  fluid_feature_contact,
  geologic_fault,
  rock_surface,
  stratigraphic_marker
 ))
 SUBTYPE OF (
  feature_boundary
 );
END_ENTITY;

ENTITY federal_permit_system_legal_survey_area
 SUBTYPE OF (
  legal_survey_area
 );
 fps_section : OPTIONAL ndt_code1 ;
 grid : OPTIONAL ndt_pint1 ;
 reference_latitude : OPTIONAL ndt_location_1d ;
 reference_longitude : OPTIONAL ndt_location_1d ;
 unit : OPTIONAL ndt_code1 ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY field
 ABSTRACT SUPERTYPE OF (ONEOF(
  prospective_field,
  regulatory_field,
  unitized_field
 ))
 SUBTYPE OF (
  business_object,
  earth_surface_feature,
  product_flow_network_unit
 );
INVERSE
 field_classification : SET[0:?] OF field_classification FOR field ;
 pool : SET[0:?] OF pool FOR field ;
 pty_surface_area_recovery_factor : SET[0:?] OF pty_surface_area_recovery_factor FOR field ;
 pty_economic_wor_limit : SET[0:?] OF pty_economic_wor_limit FOR field ;
 pty_economic_water_cut_limit : SET[0:?] OF pty_economic_water_cut_limit FOR field ;
 pty_economic_oil_cut_limit : SET[0:?] OF pty_economic_oil_cut_limit FOR field ;
 pty_economic_limit_money : SET[0:?] OF pty_economic_limit_money FOR field ;
 pty_economic_gor_limit : SET[0:?] OF pty_economic_gor_limit FOR field ;
END_ENTITY;

ENTITY field_classification
 SUBTYPE OF (
  transient_association
 );
 field : field ;
 ref_field : ref_field ;
UNIQUE
 si: end_time,
     start_time,
     field,
     ref_field;
END_ENTITY;

ENTITY filter_cake
 SUBTYPE OF (
  material,
  material_sample
 );
INVERSE
 pty_electric_resistivity : SET[0:?] OF pty_electric_resistivity FOR filter_cake ;
 pty_temperature : SET[0:?] OF pty_temperature FOR filter_cake ;
 pty_density_solid : SET[0:?] OF pty_density_solid FOR filter_cake ;
 pty_thickness : SET[0:?] OF pty_thickness FOR filter_cake ;
 pty_volume : SET[0:?] OF pty_volume FOR filter_cake ;
 pty_pressure : SET[0:?] OF pty_pressure FOR filter_cake ;
UNIQUE
 si: identifier,
     ref_existence_kind,
     produced_by_activity,
     source_activity;
END_ENTITY;

ENTITY fish
 SUBTYPE OF (
  wellbore_device
 );
UNIQUE
 si: ref_existence_kind,
     belongs_to_assembly,
     identifier,
     wellbore;
END_ENTITY;

ENTITY float_collar
 SUBTYPE OF (
  wellbore_device
 );
 inner_diameter : OPTIONAL ndt_length_diameter ;
UNIQUE
 si: identifier,
     wellbore,
     belongs_to_assembly,
     ref_existence_kind;
END_ENTITY;

ENTITY flow_control_facility
 SUBTYPE OF (
  general_facility
 );
UNIQUE
 si: name,
     ref_existence_kind,
     identifying_facility;
END_ENTITY;

ENTITY flow_system_analysis
 SUBTYPE OF (
  activity
 );
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY fluid_analysis
 SUBTYPE OF (
  materials_characterization
 );
 fluid_system : OPTIONAL SET[0:?] OF fluid_system ;
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY fluid_component
 ABSTRACT SUPERTYPE OF (ONEOF(
  ref_generic_fluid_component,
  specific_fluid_component
 ));
INVERSE
 fluid_phase_composition : SET[0:?] OF fluid_phase_composition FOR fluid_component ;
 evaluated_flow_stream : SET[0:?] OF evaluated_flow_stream FOR fluid_component ;
 allocated_flow_stream : SET[0:?] OF allocated_flow_stream FOR fluid_component ;
 allowable_flow_stream : SET[0:?] OF allowable_flow_stream FOR fluid_component ;
END_ENTITY;

ENTITY fluid_component_interaction
 SUBTYPE OF (
  association
 );
 description : OPTIONAL ndt_comment ;
 j_component : specific_fluid_component ;
 i_component : specific_fluid_component ;
INVERSE
 pty_binary_interaction_coefficient : SET[0:?] OF pty_binary_interaction_coefficient FOR fluid_component_interaction ;
UNIQUE
 si: j_component,
     i_component;
WHERE
  dri : i_component :<>: j_component;
END_ENTITY;

ENTITY fluid_feature_contact
 SUBTYPE OF (
  feature_boundary_undivided
 );
 ref_fluid_contact : ref_fluid_contact ;
INVERSE
 pty_capillary_transition_zone_height : SET[0:?] OF pty_capillary_transition_zone_height FOR fluid_feature_contact ;
UNIQUE
 si: identifier,
     ref_fluid_contact;
END_ENTITY;

ENTITY fluid_filtrate
 SUBTYPE OF (
  fluid_sample
 );
INVERSE
 pty_fluid_loss : SET[0:?] OF pty_fluid_loss FOR fluid_filtrate ;
 pty_electric_resistivity : SET[0:?] OF pty_electric_resistivity FOR fluid_filtrate ;
UNIQUE
 si: identifier,
     ref_existence_kind;
END_ENTITY;

ENTITY fluid_flow_stream
 ABSTRACT SUPERTYPE OF (ONEOF(
  allocated_flow_stream,
  allowable_flow_stream,
  evaluated_flow_stream,
  measured_flow_stream
 ))
 SUBTYPE OF (
  business_object
 );
 description : OPTIONAL ndt_comment ;
 product_flow_network_unit_port : product_flow_network_unit_port ;
INVERSE
 pty_curve_fit_result : SET[0:?] OF pty_curve_fit_result FOR fluid_flow_stream ;
 pty_decline_rate : SET[0:?] OF pty_decline_curve FOR fluid_flow_stream ;
 pty_economic_limit : SET[0:?] OF pty_economic_limit FOR fluid_flow_stream ;
 source_for_allocation : SET[0:?] OF fluid_flow_stream_allocation FOR source ;
 target_of_allocation : SET[0:?] OF fluid_flow_stream_allocation FOR target ;
END_ENTITY;

ENTITY fluid_flow_stream_allocation
 SUBTYPE OF (
  transient_association
 );
 source : fluid_flow_stream ;
 target : fluid_flow_stream ;
INVERSE
 pty_fluid_flow_stream_split_factor : SET[0:?] OF pty_fluid_flow_stream_split_factor FOR fluid_flow_stream_allocation ;
 pty_fluid_flow_stream_shrinkage_factor : SET[0:?] OF pty_fluid_flow_stream_shrinkage_factor FOR fluid_flow_stream_allocation ;
UNIQUE
 si: end_time,
     source,
     target,
     start_time;
END_ENTITY;

ENTITY fluid_lift_system
 SUBTYPE OF (
  general_facility
 );
INVERSE
 lift_system_analysis : SET[0:?] OF lift_system_analysis FOR fluid_lift_system ;
UNIQUE
 si: name,
     ref_existence_kind,
     identifying_facility;
END_ENTITY;

ENTITY fluid_phase
 ABSTRACT SUPERTYPE OF (ONEOF(
  ref_generic_fluid_phase,
  specific_fluid_phase
 ));
INVERSE
 fluid_saturation_condition : SET[0:?] OF fluid_saturation_condition FOR fluid_phase ;
 wets_fluid_rock_system : SET[0:?] OF rock_fluid_interaction FOR wetting_phase ;
 immobile_for : SET[0:?] OF two_phase_rock_fluid_interaction FOR immobile_phase ;
 nonwets_two_phase : SET[0:?] OF two_phase_rock_fluid_interaction FOR nonwetting_phase ;
 intermediate_wets : SET[0:?] OF three_phase_rock_fluid_interaction FOR intermediate_phase ;
 nonwets_three_phase : SET[0:?] OF three_phase_rock_fluid_interaction FOR nonwetting_phase ;
 nonwets_capillary_pressure_curve : SET[0:?] OF capillary_pressure_curve FOR nonwetting_phase ;
 wets_capillary_pressure_curve : SET[0:?] OF capillary_pressure_curve FOR wetting_phase ;
 nonwets_capillary_pressure_point : SET[0:?] OF capillary_pressure_point FOR nonwetting_phase ;
 wets_capillary_pressure_point : SET[0:?] OF capillary_pressure_point FOR wetting_phase ;
 surface_fluid_phase_condition : SET[0:?] OF surface_fluid_phase_condition FOR fluid_phase ;
 evaluated_flow_stream : SET[0:?] OF evaluated_flow_stream FOR fluid_phase ;
 measured_flow_stream : SET[0:?] OF measured_flow_stream FOR fluid_phase ;
END_ENTITY;

ENTITY fluid_phase_aqueous
 SUBTYPE OF (
  fluid_phase_liquid
 );
INVERSE
 pty_salinity : SET[0:?] OF pty_salinity FOR fluid_phase_aqueous ;
END_ENTITY;

ENTITY fluid_phase_composition
 SUBTYPE OF (
  association
 );
 fluid_phase : specific_fluid_phase ;
 fluid_system_state : OPTIONAL fluid_system_state ;
 fluid_component : fluid_component ;
INVERSE
 pty_fluid_phase_component_distribution : SET[0:?] OF pty_fluid_phase_component_distribution FOR fluid_phase_composition ;
 pty_absolute_abundance : SET[0:?] OF pty_absolute_abundance FOR fluid_phase_composition ;
 pty_volume_fraction : SET[0:?] OF pty_volume_fraction FOR fluid_phase_composition ;
 pty_mole_fraction : SET[0:?] OF pty_mole_fraction FOR fluid_phase_composition ;
 pty_mass_fraction : SET[0:?] OF pty_mass_fraction FOR fluid_phase_composition ;
UNIQUE
 si: fluid_phase,
     fluid_system_state,
     fluid_component;
WHERE
  sri : fluid_phase in fluid_system_state.fluid_phase;
END_ENTITY;

ENTITY fluid_phase_interface
 SUBTYPE OF (
  association
 );
 name : ndt_name ;
 fluid_phase : SET[2:2] OF specific_fluid_phase ;
 fluid_system : fluid_system ;
 fluid_component : OPTIONAL specific_fluid_component ;
INVERSE
 pty_fluid_phase_interface_distribution : SET[0:?] OF pty_fluid_phase_interface_distribution FOR fluid_phase_interface ;
 pty_interfacial_tension_curve : SET[0:?] OF pty_interfacial_tension_curve FOR fluid_phase_interface ;
 pty_interfacial_tension_point : SET[0:?] OF pty_interfacial_tension_point FOR fluid_phase_interface ;
 pty_modified_equilibrium_ratio_curve : SET[0:?] OF pty_modified_equilibrium_ratio_curve FOR fluid_phase_interface ;
 pty_equilibrium_ratio_curve : SET[0:?] OF pty_equilibrium_ratio_curve FOR fluid_phase_interface ;
 pty_equilibrium_ratio_point : SET[0:?] OF pty_equilibrium_ratio_point FOR fluid_phase_interface ;
 pty_interfacial_tension : SET[0:?] OF pty_interfacial_tension FOR fluid_phase_interface ;
UNIQUE
 si: name,
     fluid_system;
WHERE
  sri : sizeof( query( f <* fluid_phase | f.fluid_system = fluid_system)) >0;
END_ENTITY;

ENTITY fluid_phase_liquid
 SUPERTYPE OF (ONEOF(
  fluid_phase_aqueous,
  fluid_phase_oleic
 ))
 SUBTYPE OF (
  specific_fluid_phase
 );
INVERSE
 pty_ph : SET[0:?] OF pty_ph FOR fluid_phase_liquid ;
 pty_shrinkage_factor : SET[0:?] OF pty_shrinkage_factor FOR fluid_phase_liquid ;
 pty_viscosity_kinematic : SET[0:?] OF pty_viscosity_kinematic FOR fluid_phase_liquid ;
 pty_viscous_compressibility : SET[0:?] OF pty_viscous_compressibility FOR fluid_phase_liquid ;
 pty_saturated_liquid_density_point : SET[0:?] OF pty_saturated_liquid_density_point FOR fluid_phase_liquid ;
 pty_saturated_liquid_density_curve : SET[0:?] OF pty_saturated_liquid_density_curve FOR fluid_phase_liquid ;
 pty_density_liquid : SET[0:?] OF pty_density_liquid FOR fluid_phase_liquid ;
 pty_liquid_gravity : SET[0:?] OF pty_liquid_gravity FOR fluid_phase_liquid ;
 pty_specific_volume_mass_liquid : SET[0:?] OF pty_specific_volume_mass_liquid FOR fluid_phase_liquid ;
 pty_viscosity : SET[0:?] OF pty_viscosity FOR fluid_phase_liquid ;
END_ENTITY;

ENTITY fluid_phase_oleic
 SUBTYPE OF (
  fluid_phase_liquid
 );
INVERSE
 pty_solution_gas_oil_ratio_curve : SET[0:?] OF pty_solution_gas_oil_ratio_curve FOR fluid_phase_oleic ;
 pty_undersaturated_viscosity_curve : SET[0:?] OF pty_undersaturated_viscosity_curve FOR fluid_phase_oleic ;
 pty_undersaturated_viscosity_point : SET[0:?] OF pty_undersaturated_viscosity_point FOR fluid_phase_oleic ;
 pty_gas_oil_pseudo_pressure : SET[0:?] OF pty_gas_oil_pseudo_pressure FOR fluid_phase_oleic ;
 pty_undersaturated_compressibility_point : SET[0:?] OF pty_undersaturated_compressibility_point FOR fluid_phase_oleic ;
 pty_undersaturated_compressibility_curve : SET[0:?] OF pty_undersaturated_compressibility_curve FOR fluid_phase_oleic ;
 pty_solution_gas_oil_ratio_point : SET[0:?] OF pty_solution_gas_oil_ratio_point FOR fluid_phase_oleic ;
 pty_undersaturated_fvf_curve : SET[0:?] OF pty_undersaturated_fvf_curve FOR fluid_phase_oleic ;
 pty_undersaturated_fvf_point : SET[0:?] OF pty_undersaturated_fvf_point FOR fluid_phase_oleic ;
END_ENTITY;

ENTITY fluid_phase_solid
 SUBTYPE OF (
  specific_fluid_phase
 );
INVERSE
 pty_density_solid : SET[0:?] OF pty_density_solid FOR fluid_phase_solid ;
END_ENTITY;

ENTITY fluid_phase_vapor
 SUBTYPE OF (
  specific_fluid_phase
 );
INVERSE
 pty_dry_gas_pressure_curve : SET[0:?] OF pty_dry_gas_pressure_curve FOR fluid_phase_vapor ;
 pty_dry_gas_pressure_point : SET[0:?] OF pty_dry_gas_pressure_point FOR fluid_phase_vapor ;
 pty_wet_gas_pressure_point : SET[0:?] OF pty_wet_gas_pressure_point FOR fluid_phase_vapor ;
 pty_wet_gas_pressure_curve : SET[0:?] OF pty_wet_gas_pressure_curve FOR fluid_phase_vapor ;
 pty_dry_gas_z_factor_curve : SET[0:?] OF pty_dry_gas_z_factor_curve FOR fluid_phase_vapor ;
 pty_dry_gas_z_factor_point : SET[0:?] OF pty_dry_gas_z_factor_point FOR fluid_phase_vapor ;
 pty_dry_gas_viscosity_point : SET[0:?] OF pty_dry_gas_viscosity_point FOR fluid_phase_vapor ;
 pty_dry_gas_viscosity_curve : SET[0:?] OF pty_dry_gas_viscosity_curve FOR fluid_phase_vapor ;
 pty_dry_gas_fvf_point : SET[0:?] OF pty_dry_gas_fvf_point FOR fluid_phase_vapor ;
 pty_dry_gas_fvf_curve : SET[0:?] OF pty_dry_gas_fvf_curve FOR fluid_phase_vapor ;
 pty_wet_gas_density_point : SET[0:?] OF pty_wet_gas_density_point FOR fluid_phase_vapor ;
 pty_wet_gas_density_curve : SET[0:?] OF pty_wet_gas_density_curve FOR fluid_phase_vapor ;
 pty_gas_expansion_factor : SET[0:?] OF pty_gas_expansion_factor FOR fluid_phase_vapor ;
 pty_gas_pseudo_pressure : SET[0:?] OF pty_gas_pseudo_pressure FOR fluid_phase_vapor ;
 pty_latent_heat_of_vaporization : SET[0:?] OF pty_latent_heat_of_vaporization FOR fluid_phase_vapor ;
 pty_pseudoreduced_compressibility : SET[0:?] OF pty_pseudoreduced_compressibility FOR fluid_phase_vapor ;
 pty_pseudoreduced_pressure : SET[0:?] OF pty_pseudoreduced_pressure FOR fluid_phase_vapor ;
 pty_pseudoreduced_temperature : SET[0:?] OF pty_pseudoreduced_temperature FOR fluid_phase_vapor ;
 pty_specific_volume_mass_gas : SET[0:?] OF pty_specific_volume_mass_gas FOR fluid_phase_vapor ;
 pty_wet_gas_z_factor_curve : SET[0:?] OF pty_wet_gas_z_factor_curve FOR fluid_phase_vapor ;
 pty_gas_gravity : SET[0:?] OF pty_gas_gravity FOR fluid_phase_vapor ;
 pty_volatile_oil_gas_ratio : SET[0:?] OF pty_volatile_oil_gas_ratio FOR fluid_phase_vapor ;
 pty_viscosity_kinematic : SET[0:?] OF pty_viscosity_kinematic FOR fluid_phase_vapor ;
 pty_wet_gas_z_factor_point : SET[0:?] OF pty_wet_gas_z_factor_point FOR fluid_phase_vapor ;
 pty_density_vapor : SET[0:?] OF pty_density_vapor FOR fluid_phase_vapor ;
 pty_viscosity : SET[0:?] OF pty_viscosity FOR fluid_phase_vapor ;
END_ENTITY;

ENTITY fluid_processing
 SUBTYPE OF (
  materials_processing
 );
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY fluid_sample
 SUPERTYPE OF (ONEOF(
  fluid_filtrate,
  pressurized_fluid_sample
 ))
 SUBTYPE OF (
  fluid_system,
  material_sample
 );
 rock_fluid_feature : OPTIONAL SET[0:?] OF rock_fluid_feature ;
INVERSE
 pty_cricondenbar : SET[0:?] OF pty_cricondenbar FOR fluid_sample ;
 pty_cricondentherm : SET[0:?] OF pty_cricondentherm FOR fluid_sample ;
 pty_critical_density : SET[0:?] OF pty_critical_density FOR fluid_sample ;
 pty_critical_volume : SET[0:?] OF pty_critical_volume FOR fluid_sample ;
 pty_cvd_mole_fraction_gas_curve : SET[0:?] OF pty_cvd_mole_fraction_gas_curve FOR fluid_sample ;
 pty_cvd_mole_fraction_gas_point : SET[0:?] OF pty_cvd_mole_fraction_gas_point FOR fluid_sample ;
 pty_critical_pressure : SET[0:?] OF pty_critical_pressure FOR fluid_sample ;
 pty_critical_temperature : SET[0:?] OF pty_critical_temperature FOR fluid_sample ;
 pty_polarized_light_rotation_angle : SET[0:?] OF pty_polarized_light_rotation_angle FOR fluid_sample ;
 pty_mass_spectrum_abundance : SET[0:?] OF pty_mass_spectrum_abundance FOR fluid_sample ;
 pty_spectral_light_intensity : SET[0:?] OF pty_spectral_light_intensity FOR fluid_sample ;
 pty_cvd_mole_fraction_liquid_point : SET[0:?] OF pty_cvd_mole_fraction_liquid_point FOR fluid_sample ;
 pty_density_vapor : SET[0:?] OF pty_density_vapor FOR fluid_sample ;
 pty_dew_point_pressure_curve : SET[0:?] OF pty_dew_point_pressure_curve FOR fluid_sample ;
 pty_dew_point_pressure : SET[0:?] OF pty_dew_point_pressure FOR fluid_sample ;
 pty_equilibrium_ratio_curve : SET[0:?] OF pty_equilibrium_ratio_curve FOR fluid_sample ;
 pty_equilibrium_ratio_point : SET[0:?] OF pty_equilibrium_ratio_point FOR fluid_sample ;
 pty_gas_gravity : SET[0:?] OF pty_gas_gravity FOR fluid_sample ;
 pty_modified_equilibrium_ratio_curve : SET[0:?] OF pty_modified_equilibrium_ratio_curve FOR fluid_sample ;
 pty_pseudoreduced_compressibility : SET[0:?] OF pty_pseudoreduced_compressibility FOR fluid_sample ;
 pty_pseudoreduced_pressure : SET[0:?] OF pty_pseudoreduced_pressure FOR fluid_sample ;
 pty_pseudoreduced_temperature : SET[0:?] OF pty_pseudoreduced_temperature FOR fluid_sample ;
 pty_pseudo_compositional_factor : SET[0:?] OF pty_pseudo_compositional_factor FOR fluid_sample ;
 pty_reduced_density : SET[0:?] OF pty_reduced_density FOR fluid_sample ;
 pty_reduced_pressure : SET[0:?] OF pty_reduced_pressure FOR fluid_sample ;
 pty_reduced_temperature : SET[0:?] OF pty_reduced_temperature FOR fluid_sample ;
 pty_reduced_vapor_pressure : SET[0:?] OF pty_reduced_vapor_pressure FOR fluid_sample ;
 pty_reduced_volume : SET[0:?] OF pty_reduced_volume FOR fluid_sample ;
 pty_saturated_compressibility_curve : SET[0:?] OF pty_saturated_compressibility_curve FOR fluid_sample ;
 pty_saturated_compressibility_point : SET[0:?] OF pty_saturated_compressibility_point FOR fluid_sample ;
 pty_saturation_pressure_curve : SET[0:?] OF pty_saturation_pressure_curve FOR fluid_sample ;
 pty_saturation_pressure_point : SET[0:?] OF pty_saturation_pressure_point FOR fluid_sample ;
 pty_steam_quality : SET[0:?] OF pty_steam_quality FOR fluid_sample ;
 pty_total_fvf_curve : SET[0:?] OF pty_total_fvf_curve FOR fluid_sample ;
 pty_total_fvf_point : SET[0:?] OF pty_total_fvf_point FOR fluid_sample ;
 pty_undersaturated_pressure_curve : SET[0:?] OF pty_undersaturated_pressure_curve FOR fluid_sample ;
 pty_undersaturated_pressure_point : SET[0:?] OF pty_undersaturated_pressure_point FOR fluid_sample ;
 pty_volatile_oil_gas_ratio : SET[0:?] OF pty_volatile_oil_gas_ratio FOR fluid_sample ;
 pty_yield : SET[0:?] OF pty_yield FOR fluid_sample ;
 pty_transient_temperature : SET[0:?] OF pty_transient_temperature FOR fluid_sample ;
 pty_cvd_mole_fraction_liquid_curve : SET[0:?] OF pty_cvd_mole_fraction_liquid_curve FOR fluid_sample ;
 pty_spectral_fluorescence_intensity : SET[0:?] OF pty_spectral_fluorescence_intensity FOR fluid_sample ;
UNIQUE
 si: identifier,
     ref_existence_kind,
     produced_by_activity,
     source_activity;
END_ENTITY;

ENTITY fluid_sample_acquisition
 SUBTYPE OF (
  sample_acquisition
 );
UNIQUE
 si: name,
     ref_existence_kind,
     typical_activity,
     containing_activity;
END_ENTITY;

ENTITY fluid_saturation_condition
 SUBTYPE OF (
  association
 );
 description : OPTIONAL ndt_comment ;
 rock_fluid_feature : OPTIONAL rock_fluid_feature ;
 fluid_phase : fluid_phase ;
 outcrop_sample : OPTIONAL outcrop_sample ;
 core : OPTIONAL core ;
 drill_cuttings_sample : OPTIONAL drill_cuttings_sample ;
INVERSE
 pty_fluid_saturation_distribution : SET[0:?] OF pty_fluid_saturation_distribution FOR fluid_saturation_condition ;
 pty_fluid_saturation_change : SET[0:?] OF pty_fluid_saturation_change FOR fluid_saturation_condition ;
 pty_saturation_gradient : SET[0:?] OF pty_saturation_gradient FOR fluid_saturation_condition ;
 pty_fluid_saturation : SET[0:?] OF pty_fluid_saturation FOR fluid_saturation_condition ;
UNIQUE
 si: rock_fluid_feature,
     fluid_phase,
     core,
     drill_cuttings_sample,
     outcrop_sample;
WHERE
  mse : exists (core) xor (exists   (drill_cuttings_sample)
    xor (exists (outcrop_sample)  xor  exists (rock_fluid_feature) ) );
END_ENTITY;

ENTITY fluid_system
 ABSTRACT SUPERTYPE OF (ONEOF(
  fluid_sample,
  reservoir_fluid_system,
  well_operation_fluid
 ))
 SUBTYPE OF (
  material
 );
 position_in_wellbore : OPTIONAL SET[0:?] OF position_in_wellbore ;
INVERSE
 fluid_system_state : SET[0:?] OF fluid_system_state FOR fluid_system ;
 fluid_analysis : SET[0:?] OF fluid_analysis FOR fluid_system ;
 fluid_phase : SET[0:?] OF specific_fluid_phase FOR fluid_system ;
 fluid_phase_interface : SET[0:?] OF fluid_phase_interface FOR fluid_system ;
 pty_fluid_compressibility : SET[0:?] OF pty_fluid_compressibility FOR fluid_system ;
 pty_molecular_weight : SET[0:?] OF pty_molecular_weight FOR fluid_system ;
 pty_natural_gasoline_content : SET[0:?] OF pty_natural_gasoline_content FOR fluid_system ;
 pty_density_liquid : SET[0:?] OF pty_density_liquid FOR fluid_system ;
 pty_density_molar : SET[0:?] OF pty_density_molar FOR fluid_system ;
 pty_ph : SET[0:?] OF pty_ph FOR fluid_system ;
 pty_temperature : SET[0:?] OF pty_temperature FOR fluid_system ;
 pty_pressure : SET[0:?] OF pty_pressure FOR fluid_system ;
 pty_liquid_gravity : SET[0:?] OF pty_liquid_gravity FOR fluid_system ;
 pty_volume : SET[0:?] OF pty_volume FOR fluid_system ;
 pty_salinity : SET[0:?] OF pty_salinity FOR fluid_system ;
END_ENTITY;

ENTITY fluid_system_state
 SUBTYPE OF (
  technical_object
 );
 description : OPTIONAL ndt_comment ;
 equilibrium : OPTIONAL ndt_logical ;
 pressure : OPTIONAL ndt_pressure ;
 temperature : OPTIONAL ndt_temperature ;
 fluid_system : fluid_system ;
INVERSE
 fluid_phase : SET[0:?] OF specific_fluid_phase FOR fluid_system_state ;
 fluid_phase_composition : SET[0:?] OF fluid_phase_composition FOR fluid_system_state ;
UNIQUE
 si: pressure,
     temperature,
     fluid_system;
END_ENTITY;

ENTITY fossil_taxon
 SUBTYPE OF (
  technical_object,
  typical_material
 );
 ref_taxonomic_class : OPTIONAL ref_taxonomic_class ;
 class_of_taxon : OPTIONAL fossil_taxon ;
 temporal_period : OPTIONAL SET[0:?] OF temporal_period ;
 synonym_of : OPTIONAL SET[0:?] OF fossil_taxon ;
INVERSE
 synonym_for : SET[0:?] OF fossil_taxon FOR synonym_of ;
 classify_taxa : SET[0:?] OF fossil_taxon FOR class_of_taxon ;
 pty_volume : SET[0:?] OF pty_volume FOR fossil_taxon ;
 pty_length : SET[0:?] OF pty_length FOR fossil_taxon ;
 pty_plane_angle : SET[0:?] OF pty_plane_angle FOR fossil_taxon ;
 pty_area_per_mass : SET[0:?] OF pty_area_per_mass FOR fossil_taxon ;
 pty_geologic_age : SET[0:?] OF pty_geologic_age FOR fossil_taxon ;
 pty_area : SET[0:?] OF pty_area FOR fossil_taxon ;
 pty_mass_per_length : SET[0:?] OF pty_mass_per_length FOR fossil_taxon ;
 pty_grain_size : SET[0:?] OF pty_grain_size FOR fossil_taxon ;
 pty_length_per_volume : SET[0:?] OF pty_length_per_volume FOR fossil_taxon ;
 pty_spore_color : SET[0:?] OF pty_spore_color FOR fossil_taxon ;
 pty_conodont_color : SET[0:?] OF pty_conodont_color FOR fossil_taxon ;
 pty_mass : SET[0:?] OF pty_mass FOR fossil_taxon ;
 pty_geologic_age_range : SET[0:?] OF pty_geologic_age_range FOR fossil_taxon ;
 pty_surface_area_per_volume : SET[0:?] OF pty_surface_area_per_volume FOR fossil_taxon ;
 pty_temperature : SET[0:?] OF pty_temperature FOR fossil_taxon ;
UNIQUE
 si: name;
END_ENTITY;

ENTITY fracture
 SUBTYPE OF (
  hole
 );
INVERSE
 pty_strike : SET[0:?] OF pty_strike FOR fracture ;
 pty_dip_azimuth : SET[0:?] OF pty_dip_azimuth FOR fracture ;
 pty_dip_angle : SET[0:?] OF pty_dip_angle FOR fracture ;
 pty_angular_direction : SET[0:?] OF pty_angular_direction FOR fracture ;
UNIQUE
 si: name,
     ref_existence_kind,
     identifying_facility;
END_ENTITY;

ENTITY gas_lift_mandrel
 SUBTYPE OF (
  wellbore_device
 );
 inner_diameter : OPTIONAL ndt_length_diameter ;
UNIQUE
 si: identifier,
     wellbore,
     belongs_to_assembly,
     ref_existence_kind;
END_ENTITY;

ENTITY gas_lift_valve
 SUBTYPE OF (
  wellbore_device
 );
 maximum_working_pressure : OPTIONAL ndt_pressure ;
 setting_pressure : OPTIONAL ndt_pressure ;
UNIQUE
 si: ref_existence_kind,
     belongs_to_assembly,
     identifier,
     wellbore;
END_ENTITY;

ENTITY gathering_facility
 SUBTYPE OF (
  general_facility,
  product_flow_network_unit
 );
INVERSE
 pty_economic_wor_limit : SET[0:?] OF pty_economic_wor_limit FOR gathering_facility ;
 pty_economic_water_cut_limit : SET[0:?] OF pty_economic_water_cut_limit FOR gathering_facility ;
 pty_economic_oil_cut_limit : SET[0:?] OF pty_economic_oil_cut_limit FOR gathering_facility ;
 pty_economic_limit_money : SET[0:?] OF pty_economic_limit_money FOR gathering_facility ;
 pty_economic_gor_limit : SET[0:?] OF pty_economic_gor_limit FOR gathering_facility ;
UNIQUE
 si: name,
     ref_existence_kind,
     identifying_facility;
END_ENTITY;

ENTITY gauge_adapter
 SUBTYPE OF (
  wellbore_device
 );
UNIQUE
 si: ref_existence_kind,
     wellbore,
     identifier,
     belongs_to_assembly;
END_ENTITY;

ENTITY general_coordinate_system_axis
 SUBTYPE OF (
  coordinate_system_axis,
  reference_behavior
 );
UNIQUE
 si: ref_quantity_property,
     coordinate_system;
END_ENTITY;

ENTITY general_earth_surface_point
 SUBTYPE OF (
  earth_surface_point,
  position_on_earth_surface
 );
 ref_other_earth_point : ref_other_earth_point ;
INVERSE
 pty_location_1d : SET[0:?] OF pty_location_1d FOR general_earth_surface_point ;
 pty_location_2d : SET[0:?] OF pty_location_2d FOR general_earth_surface_point ;
 pty_location_3d : SET[0:?] OF pty_location_3d FOR general_earth_surface_point ;
 pty_azimuth : SET[0:?] OF pty_azimuth FOR general_earth_surface_point ;
 pty_inclination_from_vertical : SET[0:?] OF pty_inclination_from_vertical FOR general_earth_surface_point ;
UNIQUE
 si: identifier,
     geologic_feature,
     geoscience_interpretation;
END_ENTITY;

ENTITY general_facility
 ABSTRACT SUPERTYPE OF (ONEOF(
  aircraft,
  anchor_winch,
  anchoring_system,
  borehole_fluid_system,
  building,
  bulk_storage_system,
  choke,
  coiled_tubing,
  coiled_tubing_reel,
  coiled_tubing_section,
  coiled_tubing_unit,
  digital_storage_facility,
  drilling_derrick_system,
  drilling_facility,
  drilling_rig,
  dynamic_positioning_system,
  electrical_battery,
  facility_reference_point,
  flow_control_facility,
  fluid_lift_system,
  gathering_facility,
  heat_exchanger,
  hoisting_system,
  hole,
  hydrocyclone,
  injection_facility,
  jacking_system,
  land_vehicle,
  manifold,
  marine_riser_system,
  material_collection_station,
  measurement_point,
  mechanical_cable,
  motor,
  mud_pit,
  nozzle,
  other_facility,
  pipeline,
  platform,
  position_sensor_facility,
  prime_mover,
  process_plant,
  production_treating_facility,
  pump,
  pump_liner,
  recorder,
  rheometer,
  rig_fluid_system,
  rig_power_system,
  rod_pumping_unit,
  rotating_system,
  sample_container,
  satellite_system,
  sensor,
  separator,
  shale_shaker,
  ship,
  standpipe_system,
  valve,
  well_control_system,
  well_log_sonde,
  well_logging_system,
  well_pad,
  wellhead,
  wireline_cable,
  wireline_cartridge
 ))
 SUBTYPE OF (
  facility
 );
 end_date : OPTIONAL ndt_date_tod ;
 name : OPTIONAL ndt_name ;
 start_date : OPTIONAL ndt_date_tod ;
 identifying_facility : OPTIONAL facility ;
INVERSE
 connected_from : SET[0:?] OF facility_connection FOR from_facility ;
 connected_to : SET[0:?] OF facility_connection FOR to_facility ;
 versions_of_facility : SET[0:?] OF facility_version FOR original_facility ;
 originals_of_facility : SET[0:?] OF facility_version FOR version_facility ;
 composed_of_facility : SET[0:?] OF facility_composition FOR whole ;
 inventory_object_storage : SET[0:?] OF inventory_object_storage FOR general_facility ;
 pty_equipment_facility : SET[0:?] OF pty_equipment_facility FOR general_facility ;
END_ENTITY;

ENTITY general_land_right
 ABSTRACT SUPERTYPE OF (ONEOF(
  mineral_right,
  surface_right
 ))
 SUBTYPE OF (
  business_object,
  product_flow_network_unit
 );
 description : OPTIONAL ndt_comment ;
 identifier : ndt_identifier ;
 ref_land_right_retention_class : OPTIONAL ref_land_right_retention_class ;
 title_agreement : OPTIONAL title_agreement ;
 application_for_permit : OPTIONAL SET[0:?] OF application_for_permit ;
INVERSE
 divestment_package : SET[0:?] OF divestment_package FOR general_land_right ;
 pty_area : SET[0:?] OF pty_area FOR general_land_right ;
 pty_economic_wor_limit : SET[0:?] OF pty_economic_wor_limit FOR general_land_right ;
 pty_economic_water_cut_limit : SET[0:?] OF pty_economic_water_cut_limit FOR general_land_right ;
 pty_economic_oil_cut_limit : SET[0:?] OF pty_economic_oil_cut_limit FOR general_land_right ;
 pty_economic_limit_money : SET[0:?] OF pty_economic_limit_money FOR general_land_right ;
 pty_economic_gor_limit : SET[0:?] OF pty_economic_gor_limit FOR general_land_right ;
END_ENTITY;

ENTITY general_surface_area
 SUBTYPE OF (
  earth_surface_area,
  position_on_earth_surface
 );
INVERSE
 pty_azimuth : SET[0:?] OF pty_azimuth FOR general_surface_area ;
 pty_inclination_from_vertical : SET[0:?] OF pty_inclination_from_vertical FOR general_surface_area ;
UNIQUE
 si: identifier,
     geologic_feature,
     geoscience_interpretation;
END_ENTITY;

ENTITY general_surface_boundary
 SUBTYPE OF (
  earth_surface_boundary,
  position_on_earth_surface
 );
UNIQUE
 si: identifier,
     geologic_feature,
     geoscience_interpretation;
END_ENTITY;

ENTITY general_surface_composite
 SUBTYPE OF (
  position_on_earth_surface
 );
 be_composed_of : OPTIONAL SET[0:?] OF position_on_earth_surface ;
INVERSE
 composite_outline : SET[0:?] OF pty_geometry_2d_ring FOR general_surface_composite ;
UNIQUE
 si: geologic_feature,
     geoscience_interpretation,
     identifier;
END_ENTITY;

ENTITY general_surface_line
 SUBTYPE OF (
  earth_surface_line,
  position_on_earth_surface
 );
INVERSE
 pty_azimuth : SET[0:?] OF pty_azimuth FOR general_surface_line ;
 pty_inclination_from_vertical : SET[0:?] OF pty_inclination_from_vertical FOR general_surface_line ;
UNIQUE
 si: identifier,
     geologic_feature,
     geoscience_interpretation;
END_ENTITY;

ENTITY general_wellbore_point
 SUBTYPE OF (
  wellbore_point
 );
UNIQUE
 si: identifier,
     wellbore_component_facility,
     well_completion,
     geologic_feature,
     wellbore,
     geoscience_interpretation;
END_ENTITY;

ENTITY geocentric_coordinate_system
 SUBTYPE OF (
  coordinate_system
 );
 geodetic_datum : geodetic_datum ;
END_ENTITY;

ENTITY geochronologic_age
 SUBTYPE OF (
  geochronologic_zone
 );
 part_of_period : OPTIONAL geochronologic_epoch ;
 next_younger_period : OPTIONAL SET[0:?] OF geochronologic_age ;
INVERSE
 next_older_period : SET[0:?] OF geochronologic_age FOR next_younger_period ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY geochronologic_eon
 SUBTYPE OF (
  geochronologic_zone
 );
 next_younger_period : OPTIONAL SET[0:?] OF geochronologic_eon ;
INVERSE
 next_older_period : SET[0:?] OF geochronologic_eon FOR next_younger_period ;
 geochronologic_era : SET[0:?] OF geochronologic_era FOR part_of_period ;
UNIQUE
 si: identifier;
END_ENTITY;

ENTITY geochronologic_epoch
 SUBT