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.
Source
<complexType name="FrostHeaveTrialType"><annotation><documentation>Extended type based on AbstractComponentObjectBaseType. Adds elements for frost heave trial type definition.</documentation></annotation><complexContent><extension base="diggs:AbstractComponentObjectBaseType"><sequence><element minOccurs="0" ref="diggs:specimenRef"/><element name="frostHeave" type="diggs:LengthMeasureType" minOccurs="0"><annotation><documentation>Frost heave, this specimen.</documentation></annotation></element></sequence></extension></complexContent></complexType>