<element name="_Operation" type="gml:AbstractCoordinateOperationType" abstract="true" substitutionGroup="gml:_SingleOperation">
<annotation>
<documentation>A parameterized mathematical operation on coordinates that transforms or converts coordinates to another coordinate reference system. This coordinate operation uses an operation method, usually with associated parameter values. However, operation methods and parameter values are directly associated with concrete subtypes, not with this abstract type.
This abstract complexType shall not be directly used, extended, or restricted in a compliant Application Schema. </documentation>
</annotation>
</element>
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