A topologically unique point in space.

earth_model (I, V: SET[0:?] earth_model(spatial_object))

Indicates various earth models which include this spatial representation. Each vertex may be part of one or more earth_model. Inherited from spatial_object.


edge (V: SET[0:?] edge(vertex))

Defines the edges for which this vertex forms part of the boundary. Each vertex may bind one or more edge.


intersection_role (I, V: SET[0:?] space_time_operation(intersecting_object))

Indicates a space/time operation for which the object is involved as an intersecting agent. For projection, this is the screen on which an object is being projected. For proximity, this is the magnet object. Each vertex may be the intersecting object for one or more space_time_operation. Inherited from topological_object.


other_composite_spatial_object (I, V: SET[0:?] other_composite_spatial_object(composite_object))

Defines the set of composite spatial objects of which this spatial object is a component. Each vertex may be a component of one or more other_composite_spatial_object. Inherited from spatial_object.


primary_role (I, V: SET[0:?] space_time_operation(primary_object))

Indicates a space/time operation for which the object is involved as a primary agent. For degeneration, this object is being degenerated. For projection, this object is being projected onto another object. For proximity, this is the container object. Each vertex may be the primary object for one or more space_time_operation. Inherited from topological_object.


primary_topological_relationship (I, V: SET[0:?] topological_relationship(primary_topological_object))

Indicates a topological relationship in which the topologic object has the role of primary agent. For an object intersection type of "inside" this is the containing role (e.g., if a city is inside a county then the county would be the primary agent). For all other object intersection types the roles are symmetrical and both relationships must be searched for a particular object. For example, if a wellbore and a formation overlap then either could be chosen as the primary agent with the other chosen as the secondary agent. Each vertex may be primarily involved in one or more topological_relationship. Inherited from topological_object.


secondary_topological_relationship (I, V: SET[0:?] topological_relationship(secondary_topological_object))

Indicates a topological relationship in which the object is in the role of secondary agent. For an object intersection type of "inside" this is the contained role (e.g., if a well is inside a field then the well would be the secondary agent). For all other object intersection types the roles are symmetrical and both relationships must be searched for a particular object. For example, if a wellbore and a formation overlap then either could be chosen as the secondary agent with the other chosen as the primary agent. Each vertex may be involved in one or more topological_relationship. Inherited from topological_object.


source_space_time_operation (I, V: BAG[0:1] space_time_operation(resulting_object))

Indicates the space/time operation from which a topological object was the result. For addition, this is the union of two objects. For degeneration, this is the degenerate object. Each vertex may be the result of one space_time_operation. Inherited from topological_object.

Local rules:

Abstract supertype:
Each VERTEX must be instantiated as one of its subtypes. These subtypes are: earth_point, other_vertex, point_element
Supertype path(s):
topological_object > spatial_object > simple_spatial_object > vertex.

Entity replicated into subtype tables (@vertex).

Referenced in Diagrams:

• CS1: Coordinate Systems
• CT2: Earth Surface Topology (0712)
• DMG3: Graphic Topology
• SM1: Spatial Model Topology Hierarchy
• SM2: Spatial Model Properties
• SM5: Other Spatial Object
• WKF: DAE Frames