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[SMIL30 LC comment] 6. SMIL 3.0 Linking

From: Dr. Olaf Hoffmann <Dr.O.Hoffmann@gmx.de>
Date: Sat, 11 Aug 2007 13:19:16 +0200
To: www-smil@w3.org
Message-Id: <200708111319.16650.Dr.O.Hoffmann@gmx.de>

Hello SMIL working group,

some comments on chapter 6:


- Examples: 
        reference the definition of the id attribute and
        of elements like seq, par, img, video, text, previously 
        not defined or referenced...
        (bad document structure, because these features are
         defined in later chapters but used and not explained here)


- wouldn't it be useful to have a type (and a title attribute
  it think it has, but the reader cannot identify this at this
  point of the specification, because this is defined in chapter
  10 - somehow opaque document structure)
  for the a element as in (X)HTML?



'The semantics of the area element in SMIL 3.0 is the same as it is for 
HTML in that it can specify that a spatial portion of a visual object can 
be selected to trigger the appearance of the link's destination.'

-> reference the module that defines visual objects?
I think, in HTML, area can only appear inside map, therefore
the sematics here seems to be slightly different, if there is
no map but visual objects...


'as in HTML [HTML4], the area element that is encoded earliest 
in the document takes precedence.'

- I looked for this in HTML4.01, but could not find it.
 Which chapter? Which section?


What happens, if the used visual object is itself interactive,
for example a SVG or (X)HTML document with a elements?
Is a 'click' in an area of such an object related to its interactivity
or to the linking behaviour of the area element?

Does it only depend on the sensitivity attribute of the 
MediaRenderAttributes module?
If yes - maybe useful to mention it here as an informational
note with a reference to the module...
And because the object is on top and the a is the parent, the
a will never get an event? 
And because the area is inside the object, the area will always
get the event?

I think, there is a paragraph in 6.6.1 about this, but it is
neither indicated as normative nor informative, therefore I'm
not sure if this is applicable here.


If it is strongly recommended that all media object elements have an 
"alt" attribute, why do especially the area elements of the example 
do not have them (in HTML alt is required for area for example)?

Example 1:

'<smil xmlns="http://www.w3.org/2007/07/SMIL30/Language">
    <video src="video" title="Interview" >
        <area id="firstQ" begin="0s" dur="20s" title="first question" /> 
        <area id="firstA" begin="first0.end" dur="50s" title="first answer" />

-> really begin="first0.end" or begin="firstQ.end" ?
     first0 would be outside the example?



'  <ref src="menu.html" region="menubar">
    <area fragment="menuitem1" href="#selection1"/>
-> define or reference definition or ref...  
Received on Saturday, 11 August 2007 11:49:08 UTC

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