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

From: Bob Morris <morris.bob@gmail.com>
Date: Fri, 21 Sep 2012 10:38:08 -0400
Message-ID: <CADUi7O72tYGgD1H-dZwk0_vxyzfM0mY8caWpOE4G2xfDzZhyJw@mail.gmail.com>
To: Paolo Ciccarese <paolo.ciccarese@gmail.com>
Cc: Sebastian Hellmann <hellmann@informatik.uni-leipzig.de>, Randall Leeds <randall.leeds@gmail.com>, Robert Sanderson <azaroth42@gmail.com>, public-openannotation <public-openannotation@w3.org>
With this or \any/ change, there is always the problem of backward
compatibility.  If the proposed change (which I favor) is adopted, I
think the previous should be deprecated and people urged to even
consider publishing existing annotations in the new form also, perhaps
with an oa:equivalentAnnotation if necessary.

Two semantically equivalent ways publishing always run a risk of some
kind of issue or other.  If both are in the core--so that both are
expected to be treated by compliant consumers, then in the current
case it seems like the main problem is that producers are imposing
more processing on consumers and this is probably a small burden for
small annotation collections.  But it might be serious for data miners
harvesting knowledge from large collections of annotations.

Bob




On Fri, Sep 21, 2012 at 8:17 AM, Paolo Ciccarese
<paolo.ciccarese@gmail.com> wrote:
> Hi Sebastian,
> that observation has been made many times by people in the text mining
> community.
> It really seems expensive to calculate the 'end' through the range given the
> high number of annotations that can be machine generated.
>
> I think I am in favor of that change at this point.
>
> Maybe we can introduce a new selector with begin/end so that who has already
> implemented begin and offset will be still ok?
>
> Best,
> Paolo
>
>
> On Fri, Sep 21, 2012 at 3:38 AM, Sebastian Hellmann
> <hellmann@informatik.uni-leipzig.de> wrote:
>>
>> 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
>>
>
>
>
> --
> Dr. Paolo Ciccarese
> http://www.paolociccarese.info/
> Biomedical Informatics Research & Development
> Instructor of Neurology at Harvard Medical School
> Assistant in Neuroscience at Mass General Hospital
> +1-857-366-1524 (mobile)   +1-617-768-8744 (office)
>
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-- 
Robert A. Morris

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UMASS-Boston
100 Morrissey Blvd
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Received on Friday, 21 September 2012 14:38:40 GMT

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