According to https://www.w3.org/Bugs/Public/show_bug.cgi?id=4048, the invalid enumeration value in anyURI_b006 is: //. Backslashes are not interpreted as path separators but they are allowed in xs:anyURI values, "file:///c:\foo\bar.jpg" for example, is valid xs:anyURI value.
From the last note of http://www.w3.org/Bugs/Public/show_bug.cgi?id=4048, it seems to me the test had been marked invalid, so I think we need to exclude this one from the jck.
Quote from the last note of bug 4048:
Perhaps we should mark these particular tests as invalid, but add a note saying
the rules are fuzzy.
Decision: mark the expected result as "invalid".