<?xml version="1.0" standalone="yes"?>
<!DOCTYPE attributes [
<!ELEMENT attributes EMPTY>
<!ATTLIST attributes nmtoken NMTOKEN #IMPLIED>
<!ATTLIST attributes nmtokens NMTOKENS #IMPLIED>
<!ENTITY ent " entity&recursive; ">
<!ENTITY recursive "reference">
]>
<attributes nmtoken="&ent; &ent; &ent;" nmtokens="Test&#13;&#10; this normalization"/>