Received a set of test files from Syd, ran the tests, and sent back the following report:
[quote]
I've attached the results of running each of your tests on each of your relevant files (under Windows using oXygen). This is a summary:

"Correct" output:
tP4_tB14_Xalan
tP5_tA1_Xsltproc
tP5_tA1_Saxon_6
tP5_tA1_Xalan
tP5_tA2_Saxon_8
tP5_tB15_Saxon_6
tP5_tB15_Xalan
tP5_tB15_Xsltproc
tP5_tB25_Saxon_8
tP5_sans_tB15_Xalan

XMLNS added to root, but some empty xmlns="" attributes:
tP4_tB14_Saxon_6
tP4_tB24_Saxon_8
tP4_tB14_Xsltproc
tP5_sans_tB15_Saxon_6
tP5_sans_tB15_Xsltproc
tP5_sans_tB25_Saxon_8

No XMLNS anywhere:
tP4_tA1_Saxon_6
tP4_tA1_Xalan
tP4_tA1_Xsltproc
tP4_tA2_Saxon_8
tP5_sans_tA1_Xsltproc
tP5_sans_tA1_Saxon_6
tP5_sans_tA1_Xalan
tP5_sans_tA2_Saxon_8
[end quote]

Syd will also test, and take results to some gurus he's meeting today. We need to know a) what we SHOULD be doing, b) under what circumstances that actually works, and c) where it doesn't work, what workarounds are available.