A grouping of activities made according to some range of characteristics. Examples of activity class are: producing, refining transporting, etc. An activity class may be classified by other activity classes. For example, the activity class producing oil may be classified as an exploitation activity, meaning that all activities that are classified as producing oil are also exploitation activities.

name (M, K, I: ndt_long_name) (1170)

The name given to the class. Inherited from classification_class.


classification_system (O, K, I: classification_system(classification_class))

The classification system with which this class is identified. Each activity_class may be a member of one classification_system. Inherited from classification_class.


source (M, I: ref_source)

The provider of this instance of reference information. If this instance is provided by POSC, then this attribute must be "POSC". Each activity_class must provided by one ref_source. Inherited from reference_behavior.


description (O, I: ndt_comment)

The description of this class, describing the criteria for exclusion and inclusion. Inherited from classification_class.


end_date (O, I: ndt_date)

The expiration of the class, after which the class is invalid. Inherited from classification_class.


start_date (O, I: ndt_date)

The date from which this class is valid. Inherited from classification_class.


status (O, I: ndt_instance_status) (0644)

The status of this instance in the version of Epicentre running in a data store. This is an enumerated datatype for which the following are the possible values: current, provisional, deprecated. Current - use without restriction. Provisional - use with caution, this value is for comment and may not appear in future releases of Epicentre. Deprecated - avoid use if possible, it is planned to remove this value in the next major release of Epicentre. Inherited from reference_behavior.


activity_classification (V: SET[0:?] activity_classification(activity_class))

These are the associations that assign this activity class to activities. Each activity_class may classifies one or more activity_classification.


activity_class_alias (V: SET[0:?] activity_class_alias(activity_class)) (1132)

These are aliases for this instance of activity class. For example, if this activity_class is "Drill Stem Test" then an alias for this might be "DST". Each activity_class may have as aliases one or more activity_class_alias.


be_a_member_of (V: SET[0:?] activity_class_classification(have_as_a_member)) (0768)

These are the associations that define other activity classes used to classify this class. For example, an activity class of safety audit may be classed as an audit. This attribute points to "audit"; the parent, or larger class via the association activity_class_classification. Each activity_class may be a member of one or more activity_class_classification.


classify (V: SET[0:?] activity_class_classification(be_classified_as)) (0768)

These associations show which other activity classes this activity class is a member of. For example, an activity class of safety audit may be classed as an audit. This attribute points to "safety audit" the child, or smaller class via the association activity_class_classification. Each activity_class may classify one or more activity_class_classification.


data_collection (I, V: SET[0:?] data_collection(collection_content))

Indicates the data collections that include this instance of E and P data. Each activity_class may be a member of one or more data_collection. Inherited from e_and_p_data.


datum_for_ranking (I, V: SET[0:?] object_ranking(base_object))

Indicates that an object is being used as a basis for comparison with another object. Each activity_class may datum for ranking one or more object_ranking. Inherited from object_of_interest.


graphical_element (I, V: SET[0:?] graphical_element(depicted_object))

Specifies one or more graphical elements which are depicting this data item. Each activity_class may be depicted by one or more graphical_element. Inherited from e_and_p_data.


guideline_or_privilege (I, V: SET[0:?] guideline_or_privilege(subject_of_guideline_or_privilege))

These are the guidelines, limitations, regulations and privileges that are defined with respect to this class or typical. This relationship defines the guidelines, etc., that apply to the objects or activities to which this instance is assigned. Each activity_class may be the subject of one or more guideline_or_privilege. Inherited from subject_of_guideline_or_privilege.


object_of_ranking (I, V: SET[0:?] object_ranking(ranked_object))

Indicates that an object is being classified in a rank order based on its characteristics. Each activity_class may object of ranking one or more object_ranking. Inherited from object_of_interest.


pty_equipment_facility (I, V: SET[0:?] pty_equipment_facility(classification_class))

The properties describing ranges of characteristics for valid members of the class. Each activity_class may have a property of one or more pty_equipment_facility. Inherited from classification_class.


source_reference (O, I: ref_source_reference)

The reference used by source to provide the standard instance, such as Petroleum Industry Data Dictionary (PIDD), Websters Ninth New Collegiate Dictionary, etc. Each activity_class may documented by one ref_source_reference. Inherited from reference_behavior.


typical_activity_classification (V: SET[0:?] typical_activity_classification(activity_class))

These are the associations that define which typical activities are assigned to this activity class. Each activity_class may classifies one or more typical_activity_classification.


version (O, I: ref_epicentre_version) (0644)

Describes the version of Epicentre when this status was assigned to this instance of reference behavior Each activity_class may version one ref_epicentre_version. Inherited from reference_behavior.

Local rules:

Uniqueness Constraint
name, classification_system
Supertype path(s):
subject_of_guideline_or_privilege > classification_class > activity_class.
e_and_p_data > object_of_interest > technical_object > classification_class > activity_class.
reference_behavior > classification_class > activity_class.

Entity projects as table ACTIVITY_CLASS.

Referenced in Diagrams:

• AC4: Activity Classes & Typicals
• HL6: Class Aliasing (0705, 1132)