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Re: feature review

From: Glenn A. Adams <gadams@xfsi.com>
Date: Sat, 16 May 2009 10:39:29 +0700
To: Sean Hayes <Sean.Hayes@microsoft.com>, Public TTWG List <public-tt@w3.org>
Message-ID: <C6344861.AAF4%gadams@xfsi.com>
inline (for a few preliminary comments)

On 5/15/09 8:05 PM, "Sean Hayes" <Sean.Hayes@microsoft.com> wrote:

> I have been reviewing the features set, and while I mostly agree with Glennıs
> formulation, I have a few suggested changes. These are based on the principles
> that:
> 
> any transformation processor should be required to understand timed text
> completely at the syntactic level,
>  
[GA] what do you mean by ³understand²?
 
> and that any presentation processor should be able to perform all of the
> timing, and all of the styling mechanics, (but not any specific styling
> properties) necessary in creating a synchronic XSL:FO document.
>  
[GA] what do you mean by ³all of the timing²? are you including animation?
regarding styling mechanics, are you saying that a PP (presentation
processor) that does not support multiple regions must support region style
inheritance?
 
> for clarity in the features themselves:
>  
> I propose #content be added to #structure, as well as the syntactic aspects of
> #layout and #styling and thus required in the transformation and presentation
> profile
> 
[GA] i prefer having the finer granularity definitions; if we want to have
an aggregate feature, e.g., one that includes #structure, #content, etc.,
then we can define a new feature labeling that aggregate;
 
> I propose #nested-div and #nested-span also be required in transformation and
> presentation profile, (and actually considered part of #content)
> I propose #styling-inheritance-region be required in the presentation profile
> (In fact I propose that all the styling mechanics be rolled up as indivisible
> #styling and required in presentation profile.)
>  
> I propose that #attribute be defined to generically replace all of the lines
> of the form:
>      A TT AF transformation processor supports the #X feature if it recognizes
> and is capable of transforming all defined values of X attribute.
>  
> With wording:
> A TT AF transformation processor supports the #attribute feature if it
> recognizes and is capable of transforming all attribute vocabulary of this
> specification.
> A TT AF presentation processor supports the #attribute feature if it
> implements all semantic support for attribute value resolution for all
> attribute vocabulary of this specification.
>  
[GA] i donıt understand this proposal; are you proposing a new feature
called ³#attribute² that means all attribute vocabulary in specification? if
so, then such a feature designation seems unuseful;
 
> I propose we merge #time-clock into #time-offset and  #time-clock-with-frames
> into #time-offset-with-frames; these donıt have an independent semantics based
> on SMIL2.1 
> (http://www.w3.org/TR/2005/REC-SMIL2-20051213/smil-timing.html#Timing-OffsetVa
> lueSyntax ), except when markerMode is specified in which case #markerMode is
> the option.
>  
> All specific style property features should be optional, with only#
> fontSize-isomorphic requiring special handling (it would be mandatory for
> visual  presentation, and optional for audible or tactile presentation).
>  
> I think there may need to be some consolidation in the #dynamicFlow features
> too, but I havenıt analysed that yet.
>  
> At some point I think we need to develop a caption profile which builds on the
> minimal presentation profile but is actually useful for web captioning (this
> is work for post Rec.) In order to facilitate that discussion though, Iıd like
> to separate out at this stage the feature tables into the following:
>  
> Core: (required in any profile (#)= to be eliminated by rolling into other
> buckets in this table)
>  
>   #attribute #content
>   #core   
>   #metadata   
>   #nested-div (#)
>   #nested-span (#)
>   #profile   
>   #structure   The following are required by any presentation profile
>   #layout #styling
>   #styling-chained (#)
>   #styling-inheritance-content (#)
>   #styling-inheritance-region (#)
>   #styling-inline (#)
>   #styling-nested (#)
>   #styling-referential( #)
>   
>  
> Aspects of timing that can be independently selected
> Timing ­ (PP)= should be mandatory in any presentation profile.
>  
>  
>   #animation #clockMode
>   #frameRate   
>   #frameRateMultiplier #markerMode
>   #smpteMode   
>   #subFrameRate  
>   #tickRate   
>   #timeBase-clock
>   #timeBase-media (PP)
>   #timeBase-smpte
>   #time-clock (PP)
>   #time-clock-with-frames
>   #timeContainer 
>   #time-offset (PP)
>   #time-offset-with-frames
>   #time-offset-with-ticks
>   #timing (PP)  
>  
> Style ­ all of these are optional except #fontSize-isomorphic which is
> required for visual presentation, but which may be ignored by aural or Braille
> display.
>  
>  
>   #backgroundColor
>   #backgroundColor-block
>   #backgroundColor-inline
>   #backgroundColor-region
>   #bidi   
>   #cellResolution
>   #color   
>   #direction   
>   #display   
>   #displayAlign  
>   #display-block 
>   #display-inline
>   #display-region
>   #dynamicFlow   
>   #dynamicFlow-block
>   #dynamicFlow-character
>   #dynamicFlow-glyph
>   #dynamicFlow-in
>   #dynamicFlow-inline
>   #dynamicFlow-inter
>   #dynamicFlow-intra
>   #dynamicFlow-jump
>   #dynamicFlow-line
>   #dynamicFlow-out
>   #dynamicFlow-smooth
>   #dynamicFlow-teletext
>   #dynamicFlow-word
>   #extent   
>   #fontFamily   
>   #fontFamily-generic
>   #fontFamily-non-generic
>   #fontSize   
>   #fontSize-anisomorphic
>   #fontSize-isomorphic
>   #fontStyle   
>   #fontStyle-italic
>   #fontWeight   
>   #fontWeight-bold
>   #length   
>   #length-cell   
>   #length-em   
>   #length-integer
>   #length-negative
>   #length-percentage
>   #length-pixel  
>   #length-positive
>   #length-real   
>   #lineHeight   
>   #opacity   
>   #origin   
>   #overflow   
>   #overflow-dynamic
>   #padding   
>   #padding-1   
>   #padding-2   
>   #padding-3   
>   #padding-4   
>   #pixelAspectRatio
>   #rollup   
>   #showBackground
>   #textAlign   
>   #textAlign-absolute
>   #textAlign-relative
>   #textDecoration
>   #textDecoration-over
>   #textDecoration-through
>   #textDecoration-under
>   #textOutline   
>   #textOutline-blur
>   #unicodeBidi   
>   #visibility   
>   #visibility-block
>   #visibility-inline
>   #visibility-region
>   #wrapOption   
>   #writingMode   
>   #writingMode-horizontal
>   #writingMode-horizontal-lr
>   #writingMode-horizontal-rl
>   #writingMode-vertical
>   #zIndex  
>  
> Sean Hayes
> Media Accessibility Strategist
> Accessibility Business Unit
> Microsoft
>  
> Office: +44 118 909 5867,
> Mobile: +44 7875 091385
>  
> 
Received on Saturday, 16 May 2009 03:40:15 GMT

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