Cross-platform XML editor

[Douglas Bates <bates@stat.wisc.edu>]

A two-part question:

a) Can you recommend a cross-platform XML editor that uses the
   DTD?  I use SGML in emacs but our data-entry people are not going
   to enjoy emacs.  A GUI-based editor is preferred.
b) If the answer to a) is Xeena
               http://www.alphaworks.ibm.com/tech/xeena
   how do I get it running on a Debian 3.0 (testing) i386 system?

   I tried downloading the tar file, expanding it, installing the
   jdk1.1, jdk1.1-dev, and jdk1.1-native packages then exporting
   JAVA_HOME=/usr/lib/jdk1.1 and running xeena.sh but that was not
   successful.

$ ./xeena.sh 
Error:
Environment variable JAVA_HOME has not been set.
XEENA needs to know where JDK or JRE is installed in your host.
Please set JAVA_HOME to the full path name of the root directory
where JDK or JRE is installed. For example, you can set JAVA_HOME
in a korn shell by the following commands:
   JAVA_HOME=/usr/jdk1.1.8
   export JAVA_HOME
when JDK is installed in directory /usr/jdk1.1.8
$ export JAVA_HOME=/usr/lib/jdk1.1
$ ./xeena.sh 
using java in [/usr/lib/jdk1.1]
Unable to initialize threads: cannot find class java/lang/Thread
Could not create Java VM