web-server/data/release/plugIns/NameExists.xml

<plugin xmlns:gml = "http://www.opengis.net/gml" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xmlns:ogc = "http://www.opengis.net/ogc" xmlns = "pluginSchema" xsi:schemaLocation = "pluginSchema /data/capabilities/validate/pluginSchema.xsd" >
<name>NameExists</name>
<description>All features must pass the provided filter</description>
<class>org.geotools.validation.attributes.NullZeroValidation</class>
<argument >
<name>attributeName</name>
<string>name</string>

</argument>
<argument >
<name>typeRef</name>
<string>*</string>

</argument>
</plugin>