| POSC Specifications Version 2.2 |
Epicentre Logical Data Model |
The rectangle which surrounds the object, defined in terms of the lower left corner and upper right corner. The bottom of the rectangle is assumed to be parallel to a line of constant latitude. The top of the rectangle is nearest to the north pole.
- composite_spatial_object (O, K: composite_spatial_object(pty_bounding_rectangle))
- Each pty_bounding_rectangle may be a property of one composite_spatial_object.
- other_spatial_object (O, K, I: other_spatial_object(property))
- Each pty_bounding_rectangle may be a property of one other_spatial_object. Inherited from property.
- activity (O, K, I: activity(process_data))
- Defines the activity which created this instance. Each pty_bounding_rectangle may be the result of one activity. Inherited from process_data.
- lower_left_corner (M: ndt_location_2d)
- The lower left corner of the rectangle.
- upper_right_corner (M: ndt_location_2d)
- The upper right corner of the rectangle.
- preferred_flag (O, I: ndt_boolean) (1047)
- The flag is set to True if this instance of property is the preferred value in this data store of this type of property for the object which this property describes. Inherited from property.
- data_collection (I, V: SET[0:?] data_collection(collection_content))
- Indicates the data collections that include this instance of E and P data. Each pty_bounding_rectangle may be a member of one or more data_collection. Inherited from e_and_p_data.
- graphical_element (I, V: SET[0:?] graphical_element(depicted_object))
- Specifies one or more graphical elements which are depicting this data item. Each pty_bounding_rectangle may be depicted by one or more graphical_element. Inherited from e_and_p_data.
- process_data_item (I, V: SET[0:?] process_data_item(process_data))
- Defines where this data was used by an activity. Each pty_bounding_rectangle may be the value for one or more process_data_item. Inherited from process_data.
Local rules:
- Uniqueness Constraint
- composite_spatial_object, other_spatial_object, activity
- [I: property] Mandatory Relationship Set
-
Each PROPERTY must "be a property of" one object.
- Supertype path(s):
-
process_data >
property >
pty_bounding_rectangle.
e_and_p_data >
property >
pty_bounding_rectangle.
Referenced in Diagrams:
Generated on Mon Dec 1 10:05:02 1997
© Copyright 1997 POSC. All rights reserved.