[news.eclipse.newcomer] UIMA descriptor editor doesn't show up

[Steinar Bang <sb@xxxxxx>]

Platform: Intel Pentium M, Ubuntu Dapper
	  eclipse 3.2.1
	  eclipse GEF SDK 3.2.1
	  EMF 2.2.0/2.2.1 (I'm not entirely sure files dated sep 21)

I'm trying to build UIMA 2.1.0 from subversion, and the component
description editor, which is an eclipse plugin, doesn't show up as a
candidate for editing .xml files.

I've followed the instructions here:
 http://incubator.apache.org/uima/svn.html

Specifically, I've:
 - checked out the 2.1.0 branch from SVN
 - built everything with 
    mvn install
 - made the eclipse project files with
    mvn -DdownloadSources=true eclipse:eclipse
 - made a distribution with 
    mvn assembly:assembly
   in the uimaj-distr directory
 - unpacked the uimaj-2.1.0-incubating-bin.tar.gz file into tmp
 - copied everything under /tmp/apache-uima/eclipsePlugins/ into
   /usr/local/eclipse/plugins/
 - stopped and started eclipse, with eclipse -clean

The plugins show up, and look normal in the PDE target platform and in
the Plug-ins view, and on manual inspection.

There are no Errors listed in the Problems view.

In the Plug-in registry view, org.apache.uima.desceditor and
org.apache.uima.jcas.jcasgenp have white-x-on-red on their icons.  But
I haven't found any way of showing what their error actually is
(usually plug-in load problems are shown as errors in the Problems
view). 

All hints, tips and tricks appreciated! 

Thanx!


- Steinar