The description of a rock or soil on the basis of characteristics such as color,mineralogic composition and grain size, both as text and as controlled terms thatallow machine parsing.
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
<element name="Lithology" type="diggs:LithologyType"><annotation><documentation>The description of a rock or soil on the basis of characteristics such as color, mineralogic composition and grain size, both as text and as controlled terms that allow machine parsing.</documentation></annotation></element>