<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE rnode [
<!ELEMENT rnode (f)>
<!ELEMENT f (#PCDATA)>
<!ATTLIST f att1 CDATA #FIXED "J">
<!ENTITY f "
   <f>
   hello world
   </f>
   ">
]>
<rnode>
   &f;
</rnode>