This package contains classes that have a canonical encoding so must be packaged separately from the packages from which the XML encoding will be generated automatically. This modified copy of xml.xsd is used with GML 3.1 applications, because of a bug in SMIL used in GML Portrayal schemas. The import should revert to the usual location for the namespace schema - i.e. http://www.w3.org/2001/xml.xsd - when the GML 3.1 depdendency is removed add required xml:lang attribute add required xml:lang attribute add optional xml:lang attribute add optional xml:lang attribute gml:CodeWithAuthorityType requires that the codeSpace attribute is provided in an instance. A wildcard for use in properties