1  <!DOCTYPE doc [
 2  	<!ELEMENT doc (norm+)>
 3  	<!ELEMENT norm EMPTY>
 4  	<!ATTLIST norm attr NMTOKENS #IMPLIED>
 5  ]>
 6  <doc>
 7  	<norm attr = ' foo bar
 8  '/>
 9  	<norm attr = 'foobar
10  
11  '/>
12  	<norm attr = 'foo	 	bar	'/>
13  	<norm attr = ' foo &#x20;bar'/>
14  </doc>