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Re: Streamlining the OA Model oax:range vs, endIndex

From: Sebastian Hellmann <hellmann@informatik.uni-leipzig.de>
Date: Fri, 21 Sep 2012 09:38:51 +0200
Message-ID: <505C198B.9030907@informatik.uni-leipzig.de>
To: Randall Leeds <randall.leeds@gmail.com>
CC: Robert Sanderson <azaroth42@gmail.com>, public-openannotation <public-openannotation@w3.org>
Hi all,
the meeting was really interesting and I learned a lot. For NIF 2.0, I 
will draft such a document specifying a mapping, between the two 
models.  I think the most difficult part here are the mappings between 
the selectors.

Here is an initial question:
In http://www.openannotation.org/spec/extension/#SelectorOffset was 
there any strong reason to use oax:range instead of something like end 
index.
When querying with SPARQL, you can:

with range: order all selections by length, get all selection of a 
specific length, query if any annotation begin at a certain position

with begin, end index: query if any annotation are within a certain 
region, query for overlaps and locality of annotations, i.e. is there an 
annotation in this paragraph?


Addition/subtraction is quite an expensive aggregate. So what do you 
think is the more common use case. I would vote for begin and end index 
and querying overlaps and inclusion. Maybe, we can do it similar to 
Apache Stanbol, which also uses endIndex.

Any opinions on this? Should I copy/paste and open an issue in the Wiki? 
Or could there be consensus right the first time?

Sebastian





Am 15.09.2012 00:54, schrieb Randall Leeds:
> On Wed, Aug 1, 2012 at 1:18 PM, Robert Sanderson <azaroth42@gmail.com> wrote:
>> I would like to propose a joint work item to create a mapping document
>> between NIF and OA, if you think that would be useful?
> I think it would be invaluable to people discovering OA and NIF to
> have such a document.
> +1
>


-- 
Dipl. Inf. Sebastian Hellmann
Department of Computer Science, University of Leipzig
Events:
* http://sabre2012.infai.org/mlode (Leipzig, Sept. 23-24-25, 2012)
* http://wole2012.eurecom.fr (*Deadline: July 31st 2012*)
Projects: http://nlp2rdf.org , http://dbpedia.org
Homepage: http://bis.informatik.uni-leipzig.de/SebastianHellmann
Research Group: http://aksw.org
Received on Friday, 21 September 2012 07:39:23 GMT

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