Docbook XML validation errors

[Charles Curley]

On a fairly recent installation of FC4, as updated, I am getting
errors when validating a docbook document. The errors start like so:

--------------------------------------------------
cd /home/ccurley/projects/yum/
nsgmls -wxml -s  yum.xml
nsgmls:/usr/share/sgml/docbook/xml-dtd-4.1.2-1.0-26/docbookx.dtd:74:15:W: named character reference
nsgmls:/usr/share/sgml/docbook/xml-dtd-4.1.2-1.0-26/docbookx.dtd:74:17:E: "X20AC" is not a function name
nsgmls:/usr/share/sgml/docbook/xml-dtd-4.1.2-1.0-26/ent/iso-amsa.ent:8:17:W: named character reference
nsgmls:/usr/share/sgml/docbook/xml-dtd-4.1.2-1.0-26/ent/iso-amsa.ent:8:19:E: "X21B6" is not a function name
nsgmls:/usr/share/sgml/docbook/xml-dtd-4.1.2-1.0-26/ent/iso-amsa.ent:9:17:W: named character reference
nsgmls:/usr/share/sgml/docbook/xml-dtd-4.1.2-1.0-26/ent/iso-amsa.ent:9:19:E: "X21B7" is not a function name

etc.
--------------------------------------------------

The DTD is as follows:

--------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
  "/usr/share/sgml/docbook/xml-dtd-4.1.2-1.0-26/docbookx.dtd"
[
<!ENTITY myemail "charlescurley at charlescurley dot com">
<!ENTITY myurl "http://www.charlescurley.com">
]>
--------------------------------------------------

This has worked in the past on an older FC4 installation, but I appear
to be missing something.

The file works fine with jade, e.g.

--------------------------------------------------
cd /home/ccurley/projects/yum/
make smooth
/usr/bin/jade  -V nochunks -t sgml -i html -d /usr/share/sgml/docbook/dsssl-stylesheets/ldp.dsl -d /usr/share/sgml/docbook/dsssl-stylesheets/ldp.dsl\#html /usr/share/sgml/xml.dcl yum.xml > yum.smooth.html
/usr/bin/jade:/usr/share/sgml/docbook/dsssl-stylesheets/ldp.dsl:20:0:E: character data is not allowed here

Compilation finished at Wed Jan 25 19:14:37
--------------------------------------------------

-- 

Charles Curley                  /"\    ASCII Ribbon Campaign
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