Abstract head of the substitution group for observations: a single qualitative orcategorical description of a zone or region, as opposed to thediggs:AbstractObservationSystem that collects many of them.diggs:FractureObservation and diggs:PlacedObservation are not members despite theirnames: FractureObservationType descends from diggs:AbstractObjectType andPlacedObservationType from diggs:AbstractComponentObjectBaseType.
Database handle for the object. It is of XML type ID, so is constrained to beunique in the XML document within which it occurs. An external identifier for the object inthe form of a URI may be constructed using standard XML and XPointer methods. This is doneby concatenating the URI for the document, a fragment separator, and the value of the idattribute.
A legacy attribute for AGS trial pit sampling features, whereobservations of different strata can occur at the same depth in a pit: areference letter or number whose sole purpose is to link the stratum onthe face sketch of the trial pit to the observation.
Source
<element abstract="true" name="AbstractObservation" type="diggs:AbstractObservationType"><annotation><documentation>Abstract head of the substitution group for observations: a single qualitative or categorical description of a zone or region, as opposed to the diggs:AbstractObservationSystem that collects many of them. diggs:FractureObservation and diggs:PlacedObservation are not members despite their names: FractureObservationType descends from diggs:AbstractObjectType and PlacedObservationType from diggs:AbstractComponentObjectBaseType.</documentation></annotation></element>