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Re: Deltas of RDF files from Sindice or other site?

From: Matthias Quasthoff <matthias--web@quasthoffs.de>
Date: Sun, 03 Oct 2010 20:51:54 +0200
Message-ID: <4CA8D0CA.4080708@quasthoffs.de>
To: Giovanni Tummarello <giovanni.tummarello@deri.org>
CC: public-lod <public-lod@w3.org>, Sindice developers list <sindice-dev@lists.deri.org>
Hi,

thanks for pointing me to Sindice's cache API. My first implementation 
draft [1] so far just tracks changes happening after the first retrieval 
but gives nice results when used, e.g., with SQUIN.

Comments and criticism welcome!

Cheers,
Matthias

[1] <http://rdfdiff.appspot.com/rss>

Am 03.10.2010 18:37, schrieb Giovanni Tummarello:
> Hi Mattihas,
>
> sorry for the delay. it is indeed a possible API which we call
> "longstanding query" or "notification api" . Not yet available , but
> we have many requests for it so it wil come.
>
> my advice at the moment would be to do it yourself client side using
> say a DB state and fetching the data from our cache
> http://sindice.com/developers/cacheapi
> there is a timestamp which reflect the last updated date.
> you might want to send sindice specific messages to the
> http://groups.google.com/group/sindice-dev
>
> Cheers Gio
>
> On Fri, Oct 1, 2010 at 7:21 PM, Matthias Quasthoff
> <matthias--web@quasthoffs.de>  wrote:
>> Dear all,
>>
>> is there a way of obtain the changes to RDF graphs over time, e.g., from
>> Sindice? I.e., that I not only see
>>
>>> _:p1 foaf:knows _:p2, _:p3
>>
>> but rather
>>
>>> [ rdf:subject _:p1; rdf:predicate foaf:knows; rdf:object _:p2; dc:date
>>> "sometime long ago" ]
>>> [ rdf:subject _:p1; rdf:predicate foaf:knows; rdf:object _:p3; dc:date
>>> "more recently" ]
>>
>> It'd be so useful to have such information (maybe using more appropriate
>> vocabulary) to somehow build something social like the Facebook Wall or
>> something based on FOAF. I'm currently collecting such data myself with the
>> input of PSTW, but maybe it has already been done?
>>
>> Thanks + cheers
>> Matthias
>>
>>
>>
>
Received on Sunday, 3 October 2010 18:53:04 UTC

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