Description of Problem:
Openjade has trouble with <empty/>-form tags.

Version-Release number of selected component (if applicable):
openjade-1.3-18

How Reproducible:
100%

Steps to Reproduce:
1. Run 'sgmlnorm -c /etc/sgml/catalog file.sgml' on this file.sgml:

<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook V3.1//EN"[]>
<article>
  <title>Demonstration of openjade bug</title>

  <section id="demo">
    <title>Bug demonstration</title>

    <para>A cross-reference to this section comes out as
     <quote><xref linkend="demo"/></quote>.</para>
  </section>
</article>


Actual Results:
<ARTICLE>
<TITLE>Demonstration of openjade bug</TITLE>
<SECTION ID="DEMO">
<TITLE>Bug demonstration</TITLE>
<PARA>A cross-reference to this section comes out as
     <QUOTE><XREF LINKEND="DEMO">&#62;</QUOTE>.</PARA>
</SECTION>
</ARTICLE>


Expected Results:
<ARTICLE>
<TITLE>Demonstration of openjade bug</TITLE>
<SECTION ID="DEMO">
<TITLE>Bug demonstration</TITLE>
<PARA>A cross-reference to this section comes out as
     <QUOTE><XREF LINKEND="DEMO"></QUOTE>.</PARA>
</SECTION>
</ARTICLE>


Additional Information:
I think that '/>' is an XML thing, but openjade ought to handle it in SGML for 
interoperability.