

RE: space

From: John Birch <john.birch@screen.subtitling.com>
Date: Tue, 2 Dec 2008 20:23:47 -0000
Message-ID: <4476B296B92A4741A49B0BD017590700AA7466@sss-uk-ex-02.screen.subtitling.local>
To: "Geoff Freed" <geoff_freed@wgbh.org>
Cc: <public-tt@w3.org>

Geoff, all...

I suspect that there will be some time to fill...as I'm proposing that
dynamic flow is dropped from the spec.
Everything I was ~promoting~ for dynamic fill can still be achieved by
'knife and fork' methods in DFXP...

What dynamic flow was intended as (at least for me :) was as a mechanism
to move some of the responsibility 
for dynamic display of text over a time period from the author... to the
display device. 
(Note there is precendence for this as some aspects of EIA608 and 708
closed captioning have a similar characteristic in that user settings
impact the display of the captions irrespective of the implied text
timing from the stream.)

A simplistic dynamic flow example would be some timed text that is
flowed onto a single line horizontal 'ticker' display.
Depending on the number of pixels in width (assuming font equivalence),
different numbers of characters would be simultaneously visible on
different width displays...I was envisaging a specification that
encouraged a smart 'dynamic flow'ing display to adjust text 'scroll'
speeds to ensure that all the text was presented within the time period
defined by the DFXP document instance. 

Still.. a moot point as I now feel certain that dynamic flow cannot be
done justice within the timeframes - certainly testing and
representative implementations would be extremely difficult to

Best regards

John Birch

John Birch | Screen Subtitling Systems Ltd | Strategic Partnerships Manager
john.birch@screen.subtitling.com | www.screen.subtitling.com


Before Printing, think about the environment

-----Original Message-----
Behalf Of Geoff Freed
Sent: 02 December 2008 14:53
To: public-tt@w3.org
Subject: xml:space

can we add a brief discussion of xml:space to the agenda this week?   
i'm confused about what's specified as default behavior in dfxp
space) versus what we talked about two weeks ago.


Received on Tuesday, 2 December 2008 20:24:31 GMT
