W3C home > Mailing lists > Public > public-openannotation@w3.org > December 2012

Re: Point vs Range/Area Selectors?

From: Paolo Ciccarese <paolo.ciccarese@gmail.com>
Date: Mon, 10 Dec 2012 16:22:57 -0500
Message-ID: <CAFPX2kCWUEE5G6c7nnqTw0g27eXq3+X-mewveuQwFfxU2=nQqQ@mail.gmail.com>
To: Jacob Jett <jgjett@gmail.com>
Cc: Robert Sanderson <azaroth42@gmail.com>, public-openannotation <public-openannotation@w3.org>
Hi Rob,
I believe the 'Point' selector - or 'Cursor' as I was calling it in
Annotation Ontology - is an important feature to support.

In terms of implementation though, as you anticipated, you can go with the
offset (range="") or with the "quote" (match="") methodology in the case of
So maybe we can formally define it as a particular case of those? Otherwise
we will have parallel definitions.


On Mon, Dec 10, 2012 at 4:04 PM, Jacob Jett <jgjett@gmail.com> wrote:

> Hi Rob,
> Point based selection seems like a good idea. This would allow for what is
> essentially a "targetless" annotation, e.g., "begin reading here", that
> targets a single point in a text. I think that this is a similar case to
> highlighting.
> We probably only need a recommendation on how to use range/area selectors
> for this rather than developing an extension for it.
> Regards,
> Jacob
> On Mon, Dec 10, 2012 at 2:54 PM, Robert Sanderson <azaroth42@gmail.com>wrote:
>> Dear all,
>> Recently in a matrix of functionalities provided by different annotation
>> systems, I saw an entry:
>> * Point Based Selection
>> This was distinguished as a single point in an image (eg x,y but 0 w and
>> h) or a single position in a text stream (eg a selector with an offset, but
>> 0 length)
>> Is it important in the Open Annotation model to have Point selectors, or
>> should we have a recommendation in the specification to use the range/area
>> selectors with 0 height/width/length?
>>  Thanks for your thoughts on this!
>> Rob

Dr. Paolo Ciccarese
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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Received on Monday, 10 December 2012 21:23:26 UTC

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