Editorial Comment on RDF/A and XMLLiterals

Many (possible all) of the XMLLiteral examples in N-triples (variant) 
are technically flawed, I suggest a simple change to section 2.2.1 
introducing N-triples with QNames that could fix this.

Flaw:

An rdf:XMLLiteral is:
- a self contained XML fragment
- in exclusive canonical XML

e.g.

"E = mc<sup>2</sup>"^^rdf:XMLLiteral is not intended as such but I 
suspect, the sup is in the namespace http://www.w3.org/2002/06/xhtml2
in which case the N-triple form would be

"E = mc<sup xmlns=\"http://www.w3.org/2002/06/xhtml2\">2</sup>"
^^rdf:XMLLiteral

Note that exclusive canonical XML requires use of " and not ', and then 
N-triples escaping of " is \"

I suggest changing the last line of the last example in 2.2.1 to replace
<sup>
with
<sup xmlns=\"http://www.w3.org/2002/06/xhtml2\">
and adding a paragraph after this.
[[
The above example illustrates a further simplication of N-triples
in this document. When the datatype is rdf:XMLLiteral, we omit the 
requirements of exclusive canonical XML. In particular, we assume a 
default namespace of http://www.w3.org/2002/06/xhtml2, and any further 
steps required by exclusive XML canonicalization are also implicit.
]]

Jeremy