| diagram |  | 
				
					| namespace | http://www.w3.org/1999/xlink | 
				
					| type | xlink:titleEltType | 
				
					| properties | | content | complex |  | mixed | true |  | abstract | true | 
 | 
				
					| used by |  | 
				
					| attributes | | Name | Type | Use | Default | Fixed | annotation |  | type |  | required |  | title |  |  | lang |  |  |  |  | | documentation |  | xml:lang is not required, but provides much of the
 motivation for title elements in addition to attributes, and so
 is provided here for convenience.
 
 | 
 | 
 | 
				
					| source | <xs:element name="title" type="xlink:titleEltType" abstract="true"/> |