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Test cases K2-NameTest-21, K2-NameTest-22, and K2-NameTest-23 all contain PITests with string literals that are not valid NCNames. The expected results for all of these tests are true and err:XPST0005. Considering the resolution of Bug #5351, I believe that these tests should accept only err:XPTY0004. If you agree with this change, then please mark these test cases as reflecting Bug #5351 in the catalog.
Fixed in CVS.