Restrict word list in XML schema

Question

I\'m writing an XML schema and need to prevent the text of an element from matching certain values. (Eg. the variableName element cannot match \'int\', \'byte\', \'string\'

Answer 1

Does it have to be W3C Schema (aka "xml schema")? Or would a standard alternative like RelaxNG work? I may be wrong but I thought it had a few impovements on combining restrictions, including ability to do intersections.