externalPE.dtd
<?xml version="1.0" encoding="UTF-8" ?>
<!ELEMENT footer (film, director)>
<!ELEMENT film (#PCDATA)>
<!ELEMENT director (#PCDATA)>
autograph.xml
<?xml version="1.0" standalone="no" ?>
<!DOCTYPE document [
<!ELEMENT document (genre, footer*)>
<!ELEMENT genre (#PCDATA)>
<!ENTITY % foot SYSTEM "externalPE.dtd">
%foot;
]>
<document>
<genre>Fiction</genre>
<footer>
<film>Fellowship of the Ring</film>
<director>Peter Jackson</director>
</footer>
</document>
Output for the example above will be:
<?xml version="1.0" standalone="no" ?>
<!DOCTYPE document (View Source for full doctype...)>
<document>
<genre>Fiction</genre>
<footer>
<film>Fellowship of the Ring</film>
<director>Peter Jackson</director>
</footer>
</document>
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