POSC Specifications: Epicentre Version 3.0 | Relational Implementation |
The coordinate positions of an object on the earth's surface in a two dimensional coordinate system. This utilizes the format of the OpenGIS Well Known Binary representation for geometry (WKBGeometry) with the exception that byteOrder is not specified and all values are double precision. The assertion is that any two positions with the same x,y values are concurrent (i.e., have the same vertical location) and the object can be fully defined by only specifying the geometry at the boundaries (i.e., the interior geometry is inherently that of the surface of the earth).
- instance_s (PK, M: CHAR VARYING(19))
- Surrogate key of the table.
- instance_create_date (O: TIMESTAMP)
- e_and_p_data.instance_create_date
This is the date that this instance was created. This date is defined by the source if imported, or is the date the instance is created if a new instance.
- last_updated (O: TIMESTAMP)
- e_and_p_data.last_updated
This is the date that this instance was last updated. This value should be updated when any part of this instance is altered (except for inverse relationships).
- coordinate_system_s (FSK, M: CHAR VARYING(19))
- pty_geometry_2d_gis.coordinate_system
This is the coordinate system of the coordinate values defined in attribute data value.
Defines a foreign key to table coordinate_system.
- unit_of_measure (FNK, M: CHAR VARYING(15))
- pty_geometry_2d_gis.unit_of_measure
The unit of measure of the coordinates in data value.
Defines a foreign key to table r_unit_of_measure.
- description (O: CHAR VARYING(2000))
- e_and_p_data.description
A remark or comment about the instance.
- instance_creator (O: CHAR VARYING(80))
- e_and_p_data.instance_creator
This is the person, company or application that created this instance. This identifies the party responsible for loading this instance.
- last_updated_by (O: CHAR VARYING(80))
- e_and_p_data.last_updated_by
This records the person or application making the update to this instance.
- preferred_flag (O: CHAR(1))
- property.preferred_flag
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.
- source (O: CHAR VARYING(80))
- e_and_p_data.source
The provider of this instance, which is usually a data provider for imported/purchased data. If this instance is provided by POSC, then this attribute must be "POSC".
- activity_s (FSK, O: CHAR VARYING(19))
- process_data.activity
Defines the activity which created this instance.
Defines a foreign key to table activity.
- composite_spatial_object_s (FSK, O: CHAR VARYING(19))
- pty_geometry_2d_gis.composite_spatial_object
Defines a foreign key to table spatial_object.
- face_s (FSK, O: CHAR VARYING(19))
- pty_geometry_2d_gis.face
Defines a foreign key to table spatial_object.
- represent_s (FSK, O: CHAR VARYING(19))
represent_t (O: CHAR VARYING(30))
- property.represent
This is the property that is the original for which this representation is an equivalent representation.
represent_s: Implements a foreign key to a row in one of the tables projected from entity property depending on the value of the next column (See below).
represent_t: Defines the name of the referenced table. Possible values are defined in @property.
Table is related to: data_value_a, data_collection_content, document_specification_part, @graphical_element, process_data_item, @property
Primary Key Constraint on: INSTANCE_S
Generated on Tue Jul 10 17:59:44 2001
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