gml:TimeCoordinateSystem 

A temporal coordinate system shall be based on a continuous interval scale defined in terms of a single time interval.
The differences to ISO 19108 TM_CoordinateSystem are:
-	the origin is specified either using the property gml:originPosition whose value is a direct time position, or using the property gml:origin whose model is gml:TimeInstantPropertyType; this permits more flexibility in representation and also supports referring to a value fixed elsewhere;
-	the interval uses gml:TimeIntervalLengthType.

Element Information

Model

gml:metaDataProperty* , gml:description{0,1} , gml:descriptionReference{0,1} , gml:identifier , gml:name* , gml:remarks{0,1} , gml:domainOfValidity , (gml:originPosition | gml:origin) , gml:interval
Children: gml:description, gml:descriptionReference, gml:domainOfValidity, gml:identifier, gml:interval, gml:metaDataProperty, gml:name, gml:origin, gml:originPosition, gml:remarks

Attributes

QName Type Fixed Default Use Inheritable Annotation
gml:id ID required 
The attribute gml:id supports provision of a handle for the XML element representing a GML Object. Its use is mandatory for all GML objects. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs.

Source 

<element name="TimeCoordinateSystem" type="gml:TimeCoordinateSystemType" substitutionGroup="gml:TimeReferenceSystem">
  <annotation>
    <documentation>A temporal coordinate system shall be based on a continuous interval scale defined in terms of a single time interval. The differences to ISO 19108 TM_CoordinateSystem are: - the origin is specified either using the property gml:originPosition whose value is a direct time position, or using the property gml:origin whose model is gml:TimeInstantPropertyType; this permits more flexibility in representation and also supports referring to a value fixed elsewhere; - the interval uses gml:TimeIntervalLengthType.</documentation>
  </annotation>
</element>

Sample