attribute id

namespace	http://www.opengis.net/gml
type	xs:ID
used by	complexTypes  AbstractCoordinateOperationBaseType AbstractCoordinateSystemBaseType AbstractDatumBaseType AbstractGeneralConversionType AbstractGeneralTransformationType AbstractGMLType AbstractMetaDataType AbstractReferenceSystemBaseType CoordinateSystemAxisBaseType DefinitionType EllipsoidBaseType OperationMethodBaseType OperationParameterBaseType OperationParameterGroupBaseType PrimeMeridianBaseType TemporalDatumBaseType
annotation	documentation Database handle for the object.  It is of XML type ID, so is constrained to be unique in the XML document within which it occurs.  An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods.  This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
source	<xs:attribute name="id" type="ID">   <xs:annotation>     <xs:documentation>Database handle for the object.  It is of XML type ID, so is constrained to be unique in the XML document within which it occurs.  An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods.  This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.</xs:documentation>   </xs:annotation> </xs:attribute>

XML Schema documentation generated by XMLSpy Schema Editor http://www.altova.com/xmlspy