Re: PSGML's syntax table for HTML error in XEmacs 21.1

Monday, 13 November 2000

        Gleb Arshinov <gleb(a)broadbase.com&gt; wrote:
...
 Save this to a file xhtml_test.html.  Open it.  Run C-c C-p
 `sgml-parse-prolog'.  At this point PSGML attempted to compile
 xhtml1-transitional.dtd, and barfed while parsing it (i.e. while
 parsing the DTD not the XHTML test document).  The backtrace for this
 is in my original message. 
Aha!  Note that you were parsing the prolog *in SGML mode*!  The real
problem here is that the ".html" extension, in conjunction with
auto-mode-alist, puts you into html-mode, which is a descendant of
sgml-mode.  Try this.  Save your test file to xhtml_test.xhtml.  Open
it.  XEmacs doesn't recognize that extension, so it is in fundamental
mode.  Now type M-x xml-mode.  Then type C-c C-p.  PSGML now tells you
"XML requires a system ID after a public ID".  Hmmm, there are a few
problems with that file.  Try this one instead:

------------------------------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"
lang="en">
  <head>
    <title>My Title</title>
  </head>

  <body>
    <h1>My Title</h1>
  </body>
</html>
------------------------------------------------------------------------

Now, *in xml-mode*, type C-c C-p.  No problem.  Type C-c C-o (to go to
the first problem spot).  It goes to the end and reports "Ok".

...
 After much scratching my head, I figured out that lines of the form:
        xml:lang language code (as per XML 1.0 spec) 
 in xhtml1-transitional.dtd were causing the parsing error.  When I
 removed these lines, PSGML was able to parse and compile the DTD.  The
 reason parsing of this DTD fails seems to be that PSGML uses
 sgml-parser-syntax to parse the DTD and it considers ':' a terminator
 for the token.  So adding ':' to sgml-parser-syntax got rid of the
 problem for me. 
Sure, but that isn't the right solution in general.  The colon should
not be in sgml-parser-syntax, since that is not good SGML.  The right
solution is to avoid assuming sgml-mode when the file extension is
.html.  I'm not sure how to do that, unfortunately.
-- 
Jerry James

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998