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Re: Media Fragment URI Syntax: 3 polls now open

From: Dave Singer <singer@apple.com>
Date: Thu, 22 Jan 2009 09:44:54 -0800
Message-Id: <p062408d0c59e610bafb6@[]>
To: RaphaŽl Troncy <Raphael.Troncy@cwi.nl>
Cc: Media Fragment <public-media-fragment@w3.org>

Thanks, that helps a lot.

At 18:35  +0100 22/01/09, RaphaŽl Troncy wrote:
>Dear Dave,
>>I was looking at these, but a first glance 
>>didn't get me to the point where I understood 
>>the questions very well (the IRC logs are not 
>>completely revealing).  What's the best 
>>statement of the question/problem for each one?
>Hum, I'm sorry that the phrasing of the 
>questions and the context I tried to put around 
>is not clear enough for the ones who were not in 
>Ghent :-( Let me give it another try ...
>During our 2nd face to face meeting, we have 
>brainstormed on what would be the syntax of the 
>media fragment URI. The wiki page summarizing 
>the current syntax is [1]. There are still some 
>issues for which we haven't make a formal 
>decision, thus these polls.
>In particular:
>>>  * What should be the primary separator in the 
>>>syntax for Media Fragment URI? 
>We agree that the *secondary* separator would be 
>the comma character (','). For example, in 
>the comma is used to separate the two time 
>points that define the sequence to retrieve. We 
>need to have a *primary* separator. For example, 
>for selecting a track _and_ a temporal sequence 
>Question: What should be the primary separator?
>Choices: '&' or ';'
>I can't remember why Yves said he would almost 
>prefer the semi-colon option ... Yves ?
>>>  * How to define a rectangle region in the 
>>>syntax for Media Fragment URI? 
>This is the traditional problem of defining a 
>rectangle region. Providing 4 int is not enough, 
>as people never know to which refer each value! 
>We decide therefore to use a string that tells 
>which value is what.
>Question: Which string should be use?
>Choices: xywh, trbl, tlbr, x1y1x2y2
>Some are longer to type but clearer ... Note 
>that trbl is the only one that prevents cropping 
>an area that would be outside the image!
>>>  * Are the quotes around track and id optional 
>>>in the syntax for Media Fragments URI? 
>Among the 4 dimensions we are considering, two 
>(track and id) will have as value a string of 
>characters. If this string can be 
>internationalized, then we need to quote them. 
>If we just write identifiers (that contain no 
>exotic characters), then the characters are 
>un-necessary making the syntax heavier.
>Question: Are the quotes around track and id optional?
>Choices: optional (yes) or mandatory (no)
>Does that help?
>Best regards.
>   RaphaŽl
>[1] http://www.w3.org/2008/WebVideo/Fragments/wiki/Syntax
>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/

David Singer
Multimedia Standards, Apple Inc.
Received on Thursday, 22 January 2009 17:47:16 UTC

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