I'm evaluating Oxygen for our DITA installation and have hit on a bit of a problem: everything works very well for the DITA files, including XML catalog resolution for specializations, etc., but links and the ditamap editor aren't getting resolved. I use URNs in links between source files, to allow authors to have local copies of resources which live in our source control system, such as <topicref href="urn:quative.tv:docs:quative/company/en_GB/concept/AboutQuative.dita" />. The documentation[1] says that "the OASIS XML catalogs present in the list maintained in the XML Catalog Preferences panel will be scanned trying to map a remote system ID (at document validation) or a URI reference (at document transformation)" If I read this correctly, this means you ignore catalog entries for URIs at validation time, which would explain why nothing is working. Is this the case, and if so, do you have any plans to support URI links in upcoming versions of Oxygen ? rgds David Linton Quative Limited . [1]http://www.oxygenxml.com/doc/ug-oxygen/using-XML-Catalogs.html This email may contain confidential and privileged material for the sole use of the intended recipient(s). Any review, use, discussion or disclosure by others is strictly prohibited. If you are not the intended recipient of this email, please contact the sender by return email and delete all copies of this email and its attachments, if any.