Get binaries or source at:

<http://www.jclark.com/sp/howtoget.htm>

Especially if you need to be able to fetch external subsets from virtual
hosts you may prefer to use lq-nsgmls instead:

<http://www.htmlhelp.com/tools/validator/offline/>

Grab the SGML declaration of HTML 4.01 and locate under MINIMIZE

  SHORTTAG YES

and replace that with

  SHORTTAG
    STARTTAG
      EMPTY    NO
      UNCLOSED NO
      NETENABL NO
    ENDTAG
      EMPTY    NO
      UNCLOSED NO
    ATTRIB
      DEFAULT  YES
      OMITNAME NO
      VALUE    NO

Set up a catalog:

SGMLDECL path/to/custom.decl
DOCTYPE  HTML path/to/custom.dtd

If you have (X)Emacs (if not, why not?) adjust the initialisation file
for neat integration with PSGML.

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-(   meno Internet.
| )  http://bednarz.nl/