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Re: ISSUE-2: What is the mime type of a media fragment? What is its relation with its parent resource?

From: RaphaŽl Troncy <Raphael.Troncy@cwi.nl>
Date: Wed, 28 Jan 2009 00:20:17 +0100
Message-ID: <497F96B1.8060205@cwi.nl>
To: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
CC: Yves Raimond <yves.raimond@gmail.com>, Michael Hausenblas <michael.hausenblas@deri.org>, David Singer <singer@apple.com>, Media Fragment <public-media-fragment@w3.org>

Dear Silvia,

> Could sombeody explain what FRBR is?
> Sorry if it's obvious to everybody else.

Sorry, I agree it is not clear for the ones who do not work on this 
topic, though I ack Yves to step in the discussion (Yves, come as often 
as you want here :-))

FRBR: http://en.wikipedia.org/wiki/FRBR or Functional Requirements for 
Bibliographic Records, a model made by IFLA for the librarians, that is, 
for describing things you put in a library (in a nutshell).
So, FRBR defines 4 abstract levels, namely: work, expression, 
manifestation, item.

Let's take an example:
   - Work:
     . w = J. S. Bachís Six suites for unaccompanied cello
   - Expression:
     . e1 = performances by Janos Starker recorded in 1963 and 1965
     . e2 = performances by Yo-Yo Ma recorded in 1983
   - Manifestation:
     . m1 = recordings (of e1) released on 33 1/3 rpm sound discs in 
1965 by Mercury
     . m2 = recordings (of e1) re-released on compact disc in 1991
by Mercury
   - Item: a single exemplar of a manifestation ... your CD, ot mine!

So, what Yves said, is that we might want to define a fragment for an 
frbr:item (i.e. a particular mp3 file stored on your web server) or 
define a fragment for a frbr:manifestation (i.e. take the 2nd chorus of 
"Let It Be" from The Beatles, abstracting the encoding version of that, 
mp3, wav, etc.)
Do I well-summarize your point Yves?

   RaphaŽl

-- 
RaphaŽl Troncy
CWI (Centre for Mathematics and Computer Science),
Science Park 123, 1098 XG Amsterdam, The Netherlands
e-mail: raphael.troncy@cwi.nl & raphael.troncy@gmail.com
Tel: +31 (0)20 - 592 4093
Fax: +31 (0)20 - 592 4312
Web: http://www.cwi.nl/~troncy/
Received on Tuesday, 27 January 2009 23:21:17 GMT

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