schema-substitutes.xml

<?xml version="1.0" encoding="UTF-8"?>

<fields>
<!-- override all the schema substitutes for gco:CharacterString 
	- we don't want any
	<field name="gco:CharacterString">
	</field> --> 

<!-- offer just the service and data identification -->
	<field name="gmd:AbstractMD_Identification">
		<substitute name="srv:SV_ServiceIdentification"/>
		<substitute name="gmd:MD_DataIdentification"/>
	</field>

<!-- just VerticalCS (exclude ML_VerticalCS) -->
	<field name="gml:VerticalCS">
	</field>

<!-- just VerticalDatum (exclude ML_VerticalDatum) -->
	<field name="gml:VerticalDatum">
	</field>

<!-- just CoordinateSystemAxis (exclude ML_CoordinateSystemAxis) -->
	<field name="gml:CoordinateSystemAxis">
	</field>
</fields>