Minor remarks on the RDFa specs

Hi,

I'd like to ask some minor clarifications on the RDF specs. Sorry in advance
for nitpicking!

- From http://www.w3.org/TR/xhtml-rdfa-primer/#id84480
"RDFa attributes validate in XHTML, using the XHTML1.1+RDFa DTD. "

>From reading about RDFa, I thought the default DTD was XHTML+RDFa 1.0, built
on XHTML1.1. What is the meaning of the above sentence? Is there such
"XHTML1.1+RDFa" DTD?


- From http://www.w3.org/TR/xhtml-rdfa-primer/#id85429
"2. Distributing and RDF document, at that URL, which defines the classes
and properties that make up the vocabulary."
Distributing and RDF document does not make sense in this context.
"Publishing an RDF document at that URL..." might be more accurate.


- From http://www.w3.org/TR/rdfa-syntax/#sec_3.10.
The last paragraph enumerates the list of RDFa attributes along with their
equivalence in RDF. While @typeof is a particular case, it might be good to
mention it here as a built-in rdf:type triple generator. (unless you left it
out on purpose?)


- From http://www.w3.org/TR/rdfa-syntax/#docconf
# There SHOULD be a @version attribute on the html element with the value
"XHTML+RDFa 1.0"
This is new to me. Was it added recently? As this is required, I will need
to create a patch for Drupal 7.


- From http://www.w3.org/TR/rdfa-syntax/#sec_5.4.3.
"An example of an attribute that can contain CURIE and non-CURIE values is
@about."
I thought @about could only have one value according to [1]. The sentence
above might let the reader think it is possible to have multiple values in
@about.

Steph.

[1] http://www.w3.org/TR/rdfa-syntax/#col_Metainformation