[foaf-protocols] sparql endpoints for metadata, or local sparql queries having pulled the rulebase

[Story Henry]

On 24 Dec 2009, at 04:52, Peter Williams wrote:

> Do we expect the cert and rsa ontologies to be hosted behind sparql endpoints, or simply be static resources?

static resources are good enough for the moment. Whenever you find an RDF resource and you want to find its meaning then you can dereference it with an HTTP Get

> Is there an official w3c sparql endpoint for all ontologies in its namespace (like cert and rsa)?

I think there are a few crawlers out there that do. You should probably check
  http://www.sindice.com/
and perhaps ask them to improve their UI or query language to make it easy to search for ontologies on certain sites.

> Im trying hard NOT to think like one things in X.500... but how does one locate the sparql endpoint(s) for a particular rulebase?

As above, the basic mechanism is to walk it like a web spider walks the web. Give a search engine like Google a URL, and it fetches the docs, finds links to other docs, and repeats the procedure with those URLs.

But it would be easy to have 'official' sparql endpoints for things. One would just need a sparql relation to do that.

> Could the ontology resource itself not simply describe it's official endpoint, so my metadata client can walk it remotely (so it can do dynamic code gen from the latest version)?

you don't need a sparql refrence point to walk anything. A sparql relation on an ontology, would be a bit like a link to Google on a web page....

Henry