DOCBOOK: Problem: X20AC is not a function name

[Sorin Marti <mas@semafor.ch>]

Hi,
Last week I downloaded docbook SGML-Version and after a few Problems it 
worked. Now I downloaded docbook xml-version and if I want to validate 
my document with the following headline:

<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" 
"/home/mas/downloads/dbxml/docbookx.dtd">

then Xemacs displays the following Error:

cd /home/mas/arbeiten/docbook/sgml/
nsgmls -wxml -s  onlyhl.xml
nsgmls:/home/mas/downloads/dbxml/docbookx.dtd:74:15:W: named character 
reference
nsgmls:/home/mas/downloads/dbxml/docbookx.dtd:74:17:E: "X20AC" is not a 
function name
nsgmls:/home/mas/downloads/dbxml/ent/iso-amsa.ent:8:17:W: named 
character reference
nsgmls:/home/mas/downloads/dbxml/ent/iso-amsa.ent:8:19:E: "X21B6" is not 
a function name
:
:
:
and so on. (About 200 similar Errors, only the name (e.g. X21B7) and the 
file (e.g. iso-ama.ent) changes.

best regards
mas

mailto: mas@semafor.ch