libopc/third_party/libxml2-2.7.7/test/VC/AttributeNmtokens

<!DOCTYPE test [
	<!ELEMENT test EMPTY>
	<!ATTLIST test attr1 NMTOKENS #IMPLIED>
]>
<!-- Should be invalid due to http://www.w3.org/XML/xml-V10-2e-errata#E20 -->
<test attr1=" a&#x9;b "/>