Help Getting Docbook working.

[Daniel Carrera <dcarrera math toronto edu>]

I've been trying to get docbook working.  I have it installed, but it
doesn't seem to recognize any of the tags.

Sample file:
<!DOCTYPE Article PUBLIC "-//GNOME//DTD DocBook PNG Variant V1.1//EN"[]>

<article id="index">
<sect1 id="intro">
    <title>Introduction</title>
    <para>This is an introduction.</para>
</sect1>
</article>


Here is the output:

$ db2html sample.sgml
output is sample
Using catalogs: /etc/sgml/sgml-docbook.cat
Using stylesheet:
/usr/share/sgml/docbook/utils-0.6.9/docbook-utils.dsl#html
Working on: /home/daniel/sample.sgml
jade:/home/daniel/sample.sgml:1:69:W: cannot generate system identifier
for public text "-//GNOME//DTD DocBook PNG Variant V1.1//EN"
jade:/home/daniel/sample.sgml:1:70:E: reference to entity "ARTICLE" for
which no system identifier could be generated
jade:/home/daniel/sample.sgml:1:0: entity was defined here
jade:/home/daniel/sample.sgml:1:70:E: DTD did not contain element
declaration for document type name
jade:/home/daniel/sample.sgml:3:12:E: there is no attribute "ID"
jade:/home/daniel/sample.sgml:3:19:E: element "ARTICLE" undefined
jade:/home/daniel/sample.sgml:4:10:E: there is no attribute "ID"
jade:/home/daniel/sample.sgml:4:17:E: element "SECT1" undefined
jade:/home/daniel/sample.sgml:5:10:E: element "TITLE" undefined
jade:/home/daniel/sample.sgml:6:9:E: element "PARA" undefined


This is what I have done so far:

1.-
Downloaded gdp-both.dsl and copied it to
/usr/lib/sgml/stylesheets/cygnus-both.dsl

It seems that docbook is looking for the stylsheet:
/usr/share/sgml/docbook/utils-0.6.9/docbook-utils.dsl

I tried replacing that one instead, but I only got more errors.
Furthermore, I would expect any stylesheet to recognize <para>, <title>
and the like.

2.-
I've downloaded the png-support-3.1.dtd and saved it to /usr/lib/sgml/ on
my Red Hat system.

3.-
I didn't have a /usr/lib/sgml/CATALOG file.  It seems that docbook is
using /usr/lib/sgml/docbook.cat instead.  I added the entry to
/usr/lib/sgml/docbook.cat and copied that to /usr/lib/sgml/CATALOG
anyways.




I really don't know what to do at this point.  It's frustrating that it's
so difficult to get DocBook working.

Could someone please help.


Daniel.