I'm trying, pretty much for the first time, to configure Oxygen 8.1 to use a catalog to resolve noNamespaceSchemaLocation= values. For example, I have this document root element: <map xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:oasis:names:tc:dita:xsd:map"

(The URN is one I made up just for testing) And this catalog: <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog" prefer="public"> <group xml:base="schema/"> <uri name="urn:oasis:names:tc:dita:xsd:map" uri="map.xsd"/> <public publicId="urn:oasis:names:tc:dita:xsd:map" uri="map.xsd"/> </group> </catalog> Where schema/ is a directory below the directory containing the catalog and the files are there (that is, a document in the same directory as the catalog with this root element is valid: <map xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="./schema/map.xsd"> I have turned on catalog verbosity and I can see in the catalogs tab that my catalog is being loaded, but I'm not sure what the "Public: " messages are telling me, but I'm seeing entries like this: SystemID: null Description: Public: null System: file:/C:/projects/DITA-OT1.3.1/schema/tblDeclMod.xsd = null In any case, my document that uses the URN is not being validated--I get the "there is no schema or DTD associated with this document" message. Is this user error or a limitation of the catalog mechanism? Thanks, Eliot -- W. Eliot Kimber Professional Services Innodata Isogen 8500 N. Mopac, Suite 402 Austin, TX 78759 (214) 954-5198 ekimber@innodata-isogen.com www.innodata-isogen.com