SGML validation

Hi All.

I use Paul Kinnucan's XAE (http://xae.sunsite.dk) for quickly generating
HTML DocBooks (great for documentation, specifications, etc.).  I almost
always inadvertently get XML DocBook elements in wrong places.  This results
in the generation of invalid XSL:FO, and broken PDFs.  So, I thought I'd try
validating the content.  The default validation command is:

nsgmls -wxml -s  <filename.xml>

The tool (XAE) I'm using generates a doctype like the following:

<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBk XML V4.1.2//EN"
"file:///c:/usr/pkg/emacs-21.2/site-lisp/xae-1.0beta7/doctypes/docbook/docbo
okx.dtd" []>

It is failing with the following errors, I'm assuming because of the
file:/// URL, instead of an http:// URL.  Is there a alternate free
validator I can use?

h:\usr\pkg\cygwin\bin\nsgmls.exe:srs.xml:3:145:E: cannot open
"file:///c:/usr/pkg/emacs-21.2/site-lisp/xae-1.0beta7/doctypes/docbook/docbo
okx.dtd" (No such file or directory)
h:\usr\pkg\cygwin\bin\nsgmls.exe:srs.xml:3:145:E: DTD did not contain
element declaration for document type name

--

Thanks,
Jeff




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