<element name="Category" substitutionGroup="gml:AbstractScalarValue" nillable="true"><annotation><documentation>A gml:Category has an optional XML attribute codeSpace, whose value is a URI which identifies a dictionary, codelist or authority for the term.</documentation></annotation><complexType><simpleContent><extension base="gml:CodeType"><attribute name="nilReason" type="gml:NilReasonType"/></extension></simpleContent></complexType></element>