SPARQL Query Results XML Format: XML 1.1

The specification defines a SPARQL Results Document as an XML document
"that is valid with respect to either the RELAX NG XML Schema or the W3C
XML Schema". This implies that results documents are only XML 1.0. (and
indeed, the reference section only talks about XML 1.0).

I would encourage the Group to make the specification XML-version
agnostic, thus enabling support for XML 1.1 as well.

Philippe