For those who want to view/edit XML as text, I can highly recommend Jedit. It is fully XML aware, including the use of catalogs. It has many plug-ins for specific purposes, XML, XSLT, JDiff and Sidekick being relevant ones. Jedit is fully Unicode compatible (all variations), as well as supporting about 30 other old or less common encodings.
David
David S. Taylor
Project Manager, Structured Information
Institute for Research in Construction
National Research Council Canada
Bldg. M-23A, Room 239
1200 Montreal Road, Ottawa, ON K1A 0R6