Re: Document fragment vocabulary

Hi, 
I am currently benchmarking several properties for such identifiers. my work targets strings and all string based documents. 
on http://aksw.org/Projects/NIF you can have a look at the proposed recipes, there is also a link to some slides. we will propose a standard for this within the lod2 project so everybody is welcome to help and provide use cases. all the best,
sebastian
--
Sent with my mobile phone, please excuse my brevity, Sebastian



Alexander Dutton <alexander.dutton@oucs.ox.ac.uk> schrieb:


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Hi all,

Say I have an XML document, <http://example.org/something.xml>;, and I
want to talk about about some part of it in RDF. As this is XML, being
able to point into it using XPath sounds ideal, leading to something like:

<#fragment> a fragment:Fragment ;
fragment:within <http://example.org/something.xml>; ;
fragment:locator "/some/path[1]"^^fragment:xpath .

(For now we can ignore whether we wanted a nodeset or a single node,
and how to handle XML namespaces.)

More generally, we might want other ways of locating fragments
(probably with a datatype for each):

* character offsets / ranges
* byte offsets / ranges
* line numbers / ranges
* some sub-rectangle of an image
* XML node IDs
* page ranges of a paginated document

Some of these will be IMT-specific and may need some more thinking
about, but the idea is there.


Has something already done this? Is it even (mostly?) sane?


Yours,

Alex


NB. Our actual use-case is having pointers into an NLM XML file
(embodying a journal article) so we can hook up our in-text reference
pointer¹ URIs to the original XML elements (<xref/>s) they were
generated from. This will allow us to work out the context of each
citation for use in further analysis of the relationship between the
citing and cited articles.

¹ See
<http://opencitations.wordpress.com/2011/07/01/nomenclature-for-citations-and-references/>;
for an explanation of the terminology.

- --
Alexander Dutton
Developer, data.ox.ac.uk, InfoDev, Oxford University Computing Services
Open Citations Project, Department of Zoology, University
of Oxford
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