<!doctype book public "-//OASIS//DTD DocBook V3.1//EN" [
<!ENTITY % refentry.ent SYSTEM "refentry.ent">
%refentry.ent;
<!ENTITY refentry.sgm SYSTEM "refentry.sgm">
<!ENTITY docinfo SYSTEM "docinfo.sgm">
]>
<book>
<bookinfo>
&docinfo;
</bookinfo>
&refentry.sgm;
</book>
