DTD for gnome documentation

[Jochen Voss <jvoss2@web.de>]

Hello,

recently I switched from the outdated cygnus-stylesheets
package to the new docbook-utils package.  As I side effect
I can no longer process the sgml files from the GNOME
documentation.

These start with

    <!DOCTYPE article PUBLIC "-//GNOME//DTD DocBook PNG Variant V1.0//EN"[
    <!ENTITY version "1.4">
    ]>

and running "db2html" on them gives error messages like

    voss@tatonka [~/zzzz/C] db2html gtt.sgml 
    output is gtt
    Using catalogs: /etc/sgml/catalog
    Using stylesheet: /usr/share/sgml/docbook/utils-0.6.9/docbook-utils.dsl#html
    Working on: /home/voss/zzzz/C/gtt.sgml
    jade:/home/voss/zzzz/C/gtt.sgml:3:0:E: cannot find "dtd/png-support-3.0.dtd"; tried "/usr/lib/sgml/dtd/png-support-3.0.dtd", "/usr/local/share/sgml/dtd/png-support-3.0.dtd", "/usr/local/lib/sgml/dtd/png-support-3.0.dtd", "/usr/share/sgml/dtd/png-support-3.0.dtd"
    jade:/home/voss/zzzz/C/gtt.sgml:3:0:E: DTD did not contain element declaration for document type name
    jade:/home/voss/zzzz/C/gtt.sgml:5:12:E: there is no attribute "ID"
    jade:/home/voss/zzzz/C/gtt.sgml:5:19:E: element "ARTICLE" undefined
    jade:/home/voss/zzzz/C/gtt.sgml:7:12:E: element "ARTHEADER" undefined

Do I need to install another package or is this a
"docbook-utils" bug?

Jochen
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