I'd be happy enough to see greater granularity for rdfs:seeAlso. I have
a use case where I want to say something like "the <uri> has been minted
recently by a source that is not authoritative but that, if widely
adopted, could become so. Either way, it's worth noting that he and I
are talking about the same thing" - and rdfs:seeAlso doesn't really
cover that nuance!
However... a property should not imply any content type AFAIAC. That's
the job of the HTTP Headers. If software de-references an rdfs:seeAlso
object and only expects RDF then it should have a suitable accept
header. if the server can't respond with that content type, there are
codes to handle that.
Phil.
On 09/01/2011 15:21, Vasiliy Faronov wrote:
On Птн, 2011-01-07 at 11:47 -0500, Tim Berners-Lee wrote:
Certainly. the tabulator follows rdfs:seeAlso and expects some terse
RDF.
and so would be crippled by any large file, and PDF would not of
course help it at all.
I take seeAlso as a fairly strong request to see the other thing, like
an HTTP redirect.
Not a generic "this is vaguely related" link at all, and not in
general to point to human-readable stuff.
Maybe it's time to define several specializations of rdfs:seeAlso with
stronger semantics?
For example (in a hypothetical namespace):
- see:authoritative -- "strong" pointer to a defining document,
equivalent to (or even superseding) follow-your-nose. Could probably
just reuse wrds:describedby, though it's not a subproperty of
rdfs:seeAlso.
- see:continued -- pointer to more data of the same nature. Would be
useful for paged data. When you have a blog marked up with RDFa, you
may want to let the consumer know that any given page is really just
a part of it. "Strength" depends on the application.
- see:historical -- pointer to data that no longer holds, thus cannot
be taken at face value, but only in conjunction with some
time-related terms (like owlTime:Interval). In other words, "don't go
there unless you are time-enabled".
- see:non_rdf -- pointer to a machine-readable description that is not
in a serialization of RDF (GRDDL not counted as one).
- see:human_readable -- pointer to a description that is human-readable
only.
--
Vasiliy Faronov
Please consider the environment before printing this email.
Find out more about Talis at http://www.talis.com/
shared innovation™
Any views or personal opinions expressed within this email may not be those of
Talis Information Ltd or its employees. The content of this email message and
any files that may be attached are confidential, and for the usage of the
intended recipient only. If you are not the intended recipient, then please
return this message to the sender and delete it. Any use of this e-mail by an
unauthorised recipient is prohibited.
Talis Information Ltd is a member of the Talis Group of companies and is
registered in England No 3638278 with its registered office at Knights Court,
Solihull Parkway, Birmingham Business Park, B37 7YB.
Talis North America is Talis Inc., 11400 Branch Ct., Fredericksburg, VA 22408,
United States of America.
--
Phil Archer
Talis Systems Ltd,
Web: http://www.talis.com
Tel: +44 1473 434770
Twitter: philarcher1
LinkedIn: http://uk.linkedin.com/in/philarcher
Personal: http://philarcher.org
