Test 109 - xml:base and XHTML1

I see test 109 listed for XHTML1 and not for XHTML5.  Test 109 is
unenforceable in XHTML1 in the browsers as XHTML will be treated the same
regardless of version.  In fact, most XML processing stacks will not be
able to enforce this test as well because xml:base processing is at the
heart of their XML processing.

Personally, I would like to see this test marked as optional due to the
conflict between the definition of XHTML 1.0/1.1, XML Base, and  "normal"
processing stacks for XML.  This conflict is outside of the control of RDFa
processors and certainly historical.

-- 
--Alex Milowski
"The excellence of grammar as a guide is proportional to the paucity of the
inflexions, i.e. to the degree of analysis effected by the language
considered."

Bertrand Russell in a footnote of Principles of Mathematics