Hello, It is a generic error message reported when a schema is not associated with the XML document using any of the association mechanisms supported in oXygen including the xsi:noNamespaceSchemaLocation attribute. An XML parser does not report such a detailed cause of the error (the attribute xsi:noNamespaceSchemaLocation was not spelled correctly, the URI specified as the value of the attribute could not be resolved using a URI resolver, etc). As you can see there are possible resolutions of the error in the error message itself and for a more advanced association mechanism like an XML catalog oXygen provides a special debugging method: the logging output of the XML catalog based entity/URI resolver which you can enable from menu Options -> Preferences -> XML -> XML Catalog -- Verbosity. Regards, Sorin Eliot Kimber wrote:

In testing my catalog's ability to resolve this document's schema:

<?xml version="1.0" encoding="UTF-8"?> <test xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:foo:/schemas/test.xsd"

...

</test>

When the catalog was not correctly configured Oxygen 9.1 reported "There is no schema or DTD associated with the document".

But what it really needed to say is "cannot find schema at schema location "urn:foo:/schemas/test.xsd".

I thought it was complaining about the form of my schema attributes.