The gml:identifier value of the referenced feature, as a fully qualifiedvalue. It gives an alternative to the gml:id in xlink:href for findingthe referenced feature, mainly to reference a feature by a globallyunique identifier and where naming conflicts occur with gml:id whenaccessing data in external files.
<element name="originalProjectRef" type="diggs:FeatureReferenceType"><annotation><appinfo source="urn:x-gml:targetElement">diggs:Project</appinfo><appinfo><diggs:deprecated since="3.1.0" replacedBy="diggs:projectRef"/></appinfo><documentation>DEPRECATED. Use projectRef. A reference to the project that first established this feature. Given by reference only.</documentation></annotation></element>