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="MeasurementGroupType"><annotation><appinfo><diggs:deprecated since="3.1.0" note="a type deriving from diggs:AbstractSampleGroupType"/></appinfo><documentation>DEPRECATED. Use a type deriving from diggs:AbstractSampleGroupType. A group type holding sample references; no element is declared with it.</documentation></annotation><complexContent><extension base="diggs:AbstractGroupType"><choice><element maxOccurs="unbounded" minOccurs="1" ref="diggs:sampleRef"><annotation><documentation>A sample that is a member of this group. Given by reference only.</documentation></annotation></element></choice></extension></complexContent></complexType>