Documento con dtd (valido)
<?xml version="1.0" standalone="no"?>
<!DOCTYPE SUBSECTION SYSTEM "report.dtd">
<SUBSECTION>
<TITLE>Well-Formed XML Documents</TITLE>
<PARA>A textual object is a well-formed XML document if: </PARA>
<LIST type="arabic">
<ITEM><PARA>Taken as a whole, it matches the production labeled document.</PARA></ITEM>
<ITEM><PARA>It meets all the well-formedness constraints given in this specification.</PARA></ITEM>
<ITEM><PARA>Each of the parsed entities which is referenced directly or indirectly within the document is well-formed.</PARA></ITEM>
</LIST>
</SUBSECTION>