For DITA 1.3's new RNG vocabulary support, I've defined an RNG schema for header markup that will be required in all DITA RNG modules and shells. If I set up a validation scenario using this schema then I can validate RNG schemas that use this markup. That is, a scenario that specifies the schema document explicitly. If I put a PI like this: <?xml-model href="urn:oasis:names:tc:dita:rng:vocabularyModuleDesc.rng" schematypens="http://relaxng.org/ns/structure/1.0"?> in one of these documents, then I can set up a validation scenario that uses the "detect schema" option and it also validates. However, what I don't seem to be able to do is get tag sense within the scope of the foreign markup--I only get options for the base RNG vocabulary. Is there a way to get tag sense for the foreign markup? Cheers, E. -- Eliot Kimber, Owner Contrext, LLC, http://contrext.com DITA Solutions for Publishers and those who publish