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Re: Attaching (embedding?) RDF

From: Martin May <maym@foobar.lu>
Date: Mon, 27 Oct 2003 19:13:37 +0000
Message-Id: <AA862F18-08B1-11D8-A3AD-0030656AB632@foobar.lu>
Cc: www-rdf-interest@w3.org
To: Rahul Singh <kingtiny@cs.cmu.edu>


Yes,

I actually looked at XMP, and it seems that they are using method #3 
(please correct me if I'm wrong). IMHO the drawback of not being able 
to store metadata in a generic way and having to write custom adaptors 
for every file type is quite a big one. On top of that, some file types 
don't support embedded metadata at all.

I was hoping that somebody would know of some alternatives to the ones 
that I presented or know of methods to overcome the drawbacks.

Thanks,

Martin

On 27 Oct 2003, at 18:43, Rahul Singh wrote:

> Have you looked at Adobe XMP?
>
> http://www.adobe.com/products/xmp/main.html
>
> Cheers,
>
> Rahul
>
> Martin May wrote:
>
>>
>>
>> I would like to attach RDF metadata to files. So far I have 
>> identified the following options for doing so, all of which have 
>> drawbacks:
>>
>> 1. given a file foo.pdf, store the metadata in a file foo.pdf.rdf in 
>> the same directory
>>
>> Main drawbacks:
>>
>> - if the file is moved or renamed, the metadata must be moved with it
>>
>> 2. store the metadata in a central repository, with a link (URI) to 
>> the file
>>
>> Main drawbacks:
>>
>> - again, if the file is moved or renamed, the link becomes invalid
>> - requires a central repository
>>
>> 3. embed the metadata in the file format
>>
>> Main drawbacks:
>>
>> - doesn't work with every file type
>> - different handling for each file type required
>>
>> 4. create an archive file which groups the file and its metadata 
>> (e.g. jar)
>>
>> Main drawbacks:
>>
>> - requires unpackaging and repackaging every time the file needs to 
>> be accessed
>>
>> Does anybody have any insights or ideas on how to improve the 
>> suggested methods, or provide me with other alternatives?
>>
>> Best regards,
>>
>> Martin May
>> University of Aberdeen
>>
>>
>
Received on Monday, 27 October 2003 14:13:27 GMT

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