- From: John Cowan <cowan@ccil.org>
- Date: Thu, 19 Apr 2007 20:22:40 -0400
- To: Sandro Hawke <sandro@w3.org>
- Cc: John Cowan <cowan@ccil.org>, Jeremy Carroll <jjc@hpl.hp.com>, semantic-web@w3.org, www-international@w3.org
Sandro Hawke scripsit:
> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
> xmlns:foaf="http://xmlns.com/foaf/0.1/"
> xml:base="http://www.w3.org/International/articles/idn-and-iri/JP????/????????????">
> <rdf:Description rdf:about="http://www.w3.org/">
> <foaf:likes rdf:resource="" />
> </rdf:Description>
> </rdf:RDF>
> ================================================================
Unfortunately, the above showed up in my mailer with a pile of question
marks, but I'll pretend it didn't. I'm also reversing the order of your
options for rhetorical purposes.
> ** Option 2:
>
> This input is not well formed XML.
In no case would an erroneous value of the xml:base attribute (for
example, "%%%" would be such a value) make an XML document *not well
formed*. It would, however, make the document not conform to the XML
Base recommendation.
However, your example is *not* such a case.
> ** Option 1:
>
> This is perfectly decent XML.
Yes, it is, and what's more it conforms to XML Base.
> It parses to this N-Triple:
>
> <http://www.w3.org/> <http://xmlns.com/foaf/0.1/likes> <http://www.w3.org/International/articles/idn-and-iri/JP????/????????????>.
Almost. It parses to the N-Triple that results when
you %-escape the above non-ASCII characters. If you
read either http://www.w3.org/2001/sw/RDFCore/ntriples/
or http://www.w3.org/TR/rdf-testcases/#ntriples , you
will find that non-ASCII characters are not permitted
in N-Triples files. Furthermore, they are not required,
because N-Triples express relations between resources
named by URIs, not by IRIs.
I repeat: the value of an xml:base attribute may contain
non-ASCII (and non-URI) characters. The resulting base URI
does not; it contains their %-escaped equivalents.
> I'm happy with this option, and I understood Jeremy and Chris to be as
> well. FWIW, the W3C RDF validator (using Jeremy's parser) does this.
If the validator returns that N-Triple then it is broken.
--
Is not a patron, my Lord [Chesterfield], John Cowan
one who looks with unconcern on a man http://www.ccil.org/~cowan
struggling for life in the water, and when cowan@ccil.org
he has reached ground encumbers him with help?
--Samuel Johnson
Received on Friday, 20 April 2007 00:22:59 UTC