It has been pointed out to me that the many resources we are
encountering for
http://opengraphprotocol.org/schema/latitude
are actually wrong - so deserving a 404, the resource should correctly
be written:
http://ogp.me/ns#latitude
But never mind, that doesn't resolve either...
On 04/11/10 18:38, Robert Fuller wrote:
Hi,
Feel free anyone to suggest opengraph use 301, 302, 303, 307 (we support
them all), since at the moment with a 404 they are missing out on all
the benefit of the sindice reasoner ;-)
http://opengraphprotocol.org/schema/latitude
It is common when publishing an ontology to have the url for each
property redirect to the rdf schema. It works great.
I would expect that a request for the aforementioned url (with accept
header set correctly) would redirect me to (probably)
http://opengraphprotocol.org/schema
Which would download nicely with a 200 status code (it doesn't, you need
to get the ontology from here
http://opengraphprotocol.org/schema/?format=rdf )
Later, when we encounter another opengraph property
http://opengraphprotocol.org/schema/longitude
We would also hope to get a 303, which would again redirect us to
http://opengraphprotocol.org/schema
Of course, we don't want to bring down opengraph server, so we have
already cached the schema the first time we downloaded (if it worked)
and know not to fetch it again now.
In my experience processing millions of rdf documents daily, the 303 has
proven quite useful and very efficient, and I would definitely recommend
it's use to opengraph and other publishers of ontologies.
Robert.
On 04/11/10 13:22, Ian Davis wrote:
Hi all,
The subject of this email is the title of a blog post I wrote last
night questioning whether we actually need to continue with the 303
redirect approach for Linked Data. My suggestion is that replacing it
with a 200 is in practice harmless and that nothing actually breaks on
the web. Please take a moment to read it if you are interested.
http://iand.posterous.com/is-303-really-necessary
Cheers,
Ian
--
Robert Fuller
Research Associate
Sindice Team
DERI, Galway
http://sindice.com/
