| namespace | http://www.w3.org/2001/SMIL20/ | 
				
					| used by |  | 
				
					| attributes | | Name | Type | Use | Default | Fixed | annotation |  | id | xs:ID | optional |  |  |  |  | class | xs:string | optional |  |  |  |  | lang |  | optional |  |  | | documentation |  | Attempting to install the relevant ISO 2- and 3-letter codes as the enumerated possible values is probably never
 going to be a realistic possibility.  See
 RFC 3066 at http://www.ietf.org/rfc/rfc3066.txt and the IANA registry
 at http://www.iana.org/assignments/lang-tag-apps.htm for
 further information.
 
 The union allows for the 'un-declaration' of xml:lang with
 the empty string.
 | 
 | 
 | 
				
					| source | <xs:attributeGroup name="structureModuleAttrs"> <xs:attribute name="id" type="ID" use="optional"/>
 <xs:attribute name="class" type="string" use="optional"/>
 <xs:attribute ref="xml:lang" use="optional"/>
 </xs:attributeGroup>
 |