A reference to an observation whose description informs this one, for example adiggs:LithologyObservation that a diggs:StratigraphyObservation ordiggs:GeoUnitObservation was interpreted from. Records provenance betweendescriptions, as distinct from diggs:sampleRef (what the observation was made on)and diggs:measurementRef (which measurements support it). The target is anindividual observation, not an observation system. Given by reference only.
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="observationRef" type="diggs:FeatureReferenceType"><annotation><appinfo source="urn:x-gml:targetElement">diggs:AbstractObservation</appinfo><documentation>A reference to an observation whose description informs this one, for example a diggs:LithologyObservation that a diggs:StratigraphyObservation or diggs:GeoUnitObservation was interpreted from. Records provenance between descriptions, as distinct from diggs:sampleRef (what the observation was made on) and diggs:measurementRef (which measurements support it). The target is an individual observation, not an observation system. Given by reference only.</documentation></annotation></element>