Schema Central > NIEM 2.1 > temporal.xsd > gml:AbstractTimeGeometricPrimitive
Advanced search
Need NIEM Help?

Recommended Reading:

Definitive XML Schema


Web Service Contract Design and Versioning for SOA


Advanced XML Applications



gml:TimeGeometricPrimitive acts as the head of a substitution group for geometric temporal primitives.
A temporal geometry shall be associated with a temporal reference system through the frame attribute that provides a URI reference that identifies a description of the reference system. Following ISO 19108, the Gregorian calendar with UTC is the default reference system, but others may also be used. The GPS calendar is an alternative reference systems in common use.
The two geometric primitives in the temporal dimension are the instant and the period. GML components are defined to support these as follows.

Element information

Type: gml:AbstractTimeGeometricPrimitiveType

Properties: Global, Qualified, Abstract



gml:id [1..1]xsd:IDfrom type gml:AbstractGMLType
frame [0..1]xsd:anyURIDefault value is "#ISO-8601".

Used in

Substitution hierarchy

Site developed and hosted by Datypic, Inc.

Please report errors or comments about this site to