James Clark unveils a new XML mode for GNU Emacs by Michael Smith (XMLHack) on the new nXML mode James has written for GNU Emacs 21.x. This is cool in several ways - a much better XML editing mode (compared to psgmls), using hilighting in emacs to make errors visible, real-time validation as you type against Relax NG schemas, pop-up validation errors and it includes the RDF/XML RelaxNG schema I've been maintaining in the RDF/XML specification. (I must check he updates to the latest version from 5 September 2003).
This means for example, that you can
edit RDF/XML files and have it check while
you type that you got the striping correct.
As soon as you put an
rdf:resource in the wrong
place, it gets underlined. Illegal use
of property attributes and bad
rdf attributes are similiarly warned.