<complexType name="TimePeriodType">
<annotation>
<appinfo source="urn:opengis:specification:gml:schema-xsd:temporal:3.1.1">temporal.xsd</appinfo>
</annotation>
<complexContent>
<extension base="gml:AbstractTimeGeometricPrimitiveType">
<sequence>
<choice>
<element name="beginPosition" type="gml:TimePositionType" />
<element name="begin" type="gml:TimeInstantPropertyType" />
</choice>
<choice>
<element name="endPosition" type="gml:TimePositionType" />
<element name="end" type="gml:TimeInstantPropertyType" />
</choice>
<group ref="gml:timeLength" minOccurs="0" />
</sequence>
</extension>
</complexContent>
</complexType>
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