Entity topological_relationship

• Defines the topology between two topological objects. For example, a city may be defined to be "inside" a county.

Attribute                                 Flags   Data Type

From transient_association:
   data_collection                        IV      set[0 .. N] of (data_collection)

                                          Indicates the data collections that include this
                                          instance of E and P data. 

   graphical_element                      IV      set[0 .. N] of (graphical_element)

                                          Specifies one or more graphical elements which
                                          are depicting this data item. 

   description                            I       ndt_comment

                                          A description of the transient association. 

   duration                               IN      ndt_time

                                          Defines the duration of the association expressed
                                          in any valid units of time. 

   end_time                               IN      ndt_date_tod

                                          End time of the association. 

   start_time                             IN      ndt_date_tod

                                          Start time of the association. 

   caused_by                              I       activity

                                          Specifies the activity which establishes this
                                          association. 

   terminated_by                          I       activity

                                          Specifies the activity which established the
                                          termination of a transient association between
                                          two objects. 


boundary_overlap                          MU      ndt_logical

                                          Boundary overlap qualifies whether or not the
                                          two objects have at least partially one of their
                                          boundaries in common. True indicates that they
                                          overlap. False indicates that they do not even
                                          partially overlap. 

ref_object_intersection                   MU      ref_object_intersection

                                          Object Intersection qualifies the result of the
                                          intersection between two objects primary and secondary.
                                          The result could be empty, equal, inside or overlap.

primary_topological_object                MU      topological_object

                                          Indicates a topologic object in the role of primary
                                          agent. For an object intersection type of "inside"
                                          this is the containing object (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.

secondary_topological_object              MU      topological_object

                                          Indicates a topologic object in the role of secondary
                                          agent in the topological relationship. For an
                                          object intersection type of "inside" this is the
                                          contained object (e.g., if a city is inside a
                                          county then the city 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. 

End of entity topological_relationship

M - mandatory, U - unique, I - inherited, V - inverse, N - named type