<?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>