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Re: Consistency for FragmentSelector value

From: Bob Morris <morris.bob@gmail.com>
Date: Wed, 20 Jun 2012 14:25:42 -0400
Message-ID: <CADUi7O47fnwGyX_FzNas0CVWuXyX_pJk8rs_b=k8ugYgKAq1wg@mail.gmail.com>
To: Robert Sanderson <azaroth42@gmail.com>
Cc: public-openannotation@w3.org
I'm not sure if my response leads to an opinion on your question and
what that opinion might turn out to be. But my issue is this:  when
the resource is not expressed as a serialization but something with
more complex structure of which a substructure is to be selected, it
is unclear whether either of these models is adequate.  A simple
example might be that the target of an Annotation is a Google BigTable
and the fragment is given by a row key and six column keys. Simpler
might be a special case of a spreadsheet with column and row headers,
and a corresponding fragment based on those headers .  Even if the
spreadsheet resource were serialized, e.g. as CSV, I might still wish
to make assertions about this data object independent of the column
and row ordering.

With  annotation of data objects, my intuition is that anything that
even smells of a linearized selection imposes consequential
requirements on the dereferencing of the selection should that be
necessary.

Bob Morris

On Wed, Jun 20, 2012 at 12:36 PM, Robert Sanderson <azaroth42@gmail.com> wrote:
> Dear all,
>
> Please could you weigh in on a minor issue of consistency.
>
> In the current specification, oa:FragmentSelector uses rdf:value to
> record the fragment, whereas other resources use the Content in RDF
> specification to include their data into the graph.
>
> Should oa:FragmentSelector also use cnt:chars, or is it more like
> TextOffsetSelector/TextQuoteSelector in that the properties should be
> just part of the graph and not able to be exported?  Is there a clear
> rule that we can use to determine which is appropriate?
>
> Many thanks,
>
> Rob
>



-- 
Robert A. Morris

Emeritus Professor  of Computer Science
UMASS-Boston
100 Morrissey Blvd
Boston, MA 02125-3390

IT Staff
Filtered Push Project
Harvard University Herbaria
Harvard University

email: morris.bob@gmail.com
web: http://efg.cs.umb.edu/
web: http://etaxonomy.org/mw/FilteredPush
http://www.cs.umb.edu/~ram
===
The content of this communication is made entirely on my
own behalf and in no way should be deemed to express
official positions of The University of Massachusetts at Boston or
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Received on Wednesday, 20 June 2012 18:26:11 GMT

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