On 10/14/13 9:16 AM, Ghislain Atemezing wrote:
Hi Frans, all
I've started a draft vocabulary for discussion re this thread.
I've re-used the following classes in other vocabulary namespaces sd:Feature; http:Message, interval:CalendarInterval, dctype:Software and org:Organization.
Below are some things that I think would benefit communication between
SPARQL endpoints and user agents. Please know that I am a novice in
Linked Data, so perhaps some of these are already covered by existing
standards or best practices, or do not make sense.

 1. The maximum number of results per request (hard limit)
 2. The amount of remaining requests (This could be used for a
    throttling mechanism that allows only a certain amount of request
    per unit of time and IP address. I remember having talked to a data
    service on the web where this information was put in the HTTP
    response headers)
 3. The time period of the next scheduled downtime
 4. The version(s) of the protocol that are supported
 5. (the URI of) a document that contains a human readable SLA or fair
    use policy for the service
 6. URIs of mirrors
Please find attached the .ttl file and a graph representation.

So, let's start from here ?!
@TODO: Any idea for a place to collaboratively update this draft? github? W3C community group ? a volunteer to host in his/her server?

HTH

Ghislain

Best you use an owl:imports relation to hook in terms from other vocabularies :-)

--

Regards,

Kingsley Idehen 
Founder & CEO
OpenLink Software
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