<complexType name="AbstractTimeGeometricPrimitiveType" abstract="true">
<annotation>
<appinfo source="urn:opengis:specification:gml:schema-xsd:temporal:3.1.1">temporal.xsd</appinfo>
<documentation xml:lang="en">
The abstract supertype for temporal geometric primitives.
A temporal geometry must be associated with a temporal reference system via URI.
The Gregorian calendar with UTC is the default reference system, following ISO
8601. Other reference systems in common use include the GPS calendar and the
Julian calendar.
</documentation>
</annotation>
<complexContent>
<extension base="gml:AbstractTimePrimitiveType">
<attribute name="frame" type="anyURI" use="optional" default="#ISO-8601" />
</extension>
</complexContent>
</complexType>
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