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RE: [MM] Status update for 2nd deliverable...

From: Uschold, Michael F <michael.f.uschold@boeing.com>
Date: Tue, 17 Jan 2006 09:20:40 -0800
Message-ID: <4301AFA5A72736428DA388B73676A38101F3F401@XCH-NW-6V1.nw.nos.boeing.com>
To: "Christian Halaschek-Wiener" <halasche@cs.umd.edu>, "Jacco van Ossenbruggen" <Jacco.van.Ossenbruggen@cwi.nl>, "Giorgos Stamou" <gstam@softlab.ntua.gr>, "Vassilis Tzouvaras" <tzouvaras@image.ntua.gr>, "Jeff Pan" <Jeff.Pan@manchester.ac.uk>, RaphaŽl Troncy <Raphael.Troncy@cwi.nl>
Cc: "SWBPD list" <public-swbp-wg@w3.org>
A good start would be to identify some use cases where having EXIF translated into RDF is useful. Playing devil's advocate, one can say it is just a trivial syntactic translation of one format to the other. What services can be supported once it is in RDF? Give examples.


From: Christian Halaschek-Wiener [mailto:halasche@cs.umd.edu] 
Sent: Tuesday, January 17, 2006 4:52 PM
To: Jacco van Ossenbruggen; Giorgos Stamou; Vassilis Tzouvaras; Jeff Pan; RaphaŽl Troncy
Cc: SWBPD list
Subject: [MM] Status update for 2nd deliverable...

I wanted to give you all some status on the EXIF section I'm working on for the 2nd deliverable. 

After looking around, I found that there are two EXIF ontologies (RDFS) currently publicly available. These include 
1) http://www.w3.org/2003/12/exif/
- this is develped by Kanzaki.com and was moved to a W3C site a while back.
- it is also the one we use in PhotoStuff

2) http://nwalsh.com/rdf/
- develped by Norm Walsh

Semantically both are very similar..they are essentially straightforward encodings of the EXIF metadata tags for images (see http://www.exif.org/Exif2-2.PDF). There are some syntactic differences, but again they are quite similar.

Both developers provide an EXIF conversion service:
1) Kanzaki - http://www.kanzaki.com/test/exif2rdf
- It is essentially a simple web page, in which you can paste and image URL to an EXIF image and it will extract the EXIF metadata and convert it to RDF.

2) Norm Walsh - http://www.nwalsh.com/java/jpegrdf/ 
                - He provides a Java program that among other things, will read an EXIF image and covert the metadata to RDF

I haven't yet compared the output of the converters in detail yet, however upon first glance they seem similar. 

As a side note, I also came across http://jigsaw.w3.org/rdfpic/ which will embed RDF in the EXIF header of JPEG files.

So, given this, I have a question...exactly how do we want to proceed and exactly what do we want to show in the 2nd deliverable. Any feedback would be great.



Christian Halaschek-Wiener

PhD Student, Dept. of Computer Science

GRA, MINDSWAP Research Group,

University of Maryland, College Park

Web page: http://www.mindswap.org/~chris
Received on Tuesday, 17 January 2006 17:20:57 UTC

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