------------------ In Gates we trust. Yeah right....
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning."
I like XMLSpy. It can validate the document against DTD/Schema if present as you edit it, really Since XML is plain text data, if you don't need such features you can use any standard editor as an XML editor. Many of today's popular Java IDEs also has XML support such as syntax highlighting, expanding/collapsing nodes, validating well-formedness etc.
Open Group Certified Distinguished IT Architect. Open Group Certified Master IT Architect. Sun Certified Architect (SCEA).