W3C home > Mailing lists > Public > www-smil@w3.org > July to September 2007

[SMIL30 LC comment] 11.4.4 to 11.11

From: Dr. Olaf Hoffmann <Dr.O.Hoffmann@gmx.de>
Date: Sun, 19 Aug 2007 15:41:31 +0200
To: www-smil@w3.org
Message-Id: <200708191541.32074.Dr.O.Hoffmann@gmx.de>

Hello SMIL working group,


some comments related to the chapters
11.4.4 to 11.11:



11.4.4

The peers, higher, and lower attributes


'The rules for adding the element to the queue are described below.'

-> the CSS box for this informative indicated container
covers some normative text on top and below.
-> change styling...

----------------------


Calculated times and pause/defer semantics

'<html ...>
....
<excl dur="indefinite">
   <priorityClass peers="defer">
      <img id="foo" begin="0s" dur="10s" .../>
      <img id="bar" begin="foo.click" .../>
   </priorityClass>
</excl>
....
</html>'

and
Handling Simultaneous Begins within excl

<html ...>
....
<excl>
   <img src="image1.jpg" begin="0s".../>
   <img src="image2.jpg" begin="10s; image1.click".../>
   <img src="image3.jpg" begin="20s; image2.click".../>
</excl>
....
</html>

and 
Implicit duration of media element time containers

'<html ...>
....
<video src="vid1.mpg" endsync="all" >
   <set dur="8s" .../>
   <animate begin="click" dur="5s" .../>
</video>
....
</html>'

and

'<html ...>
....
<video src="vid1.mpg" timeContainer="seq" endsync="first" >
   <animate dur="4s" .../>
   <animate end="click" .../>
</video>
....
</html>'

and (in 11.4.5 Computing the active duration)

'<html ...>
....
<seq>
   <img src="slide1.jpg" dur="10s" end="click" />
   <img src="slide2.jpg" dur="10s" end="click" />
   <img src="slide3.jpg" dur="10s" end="click" />
   <!-- etc., etc. -->
</seq>
....
</html>'


-> (1)
This looks like a mixture of XHTML and SMIL?
XHTML does not have a video (excl, seq etc) element.
SMIL does not have a html element.
But if it is a mixture, doesn't either the
html or the video or the attributes need a 
xmlns prefix?
Or another element with a xmlns attribute
for SMIL?
-> maybe better to use a smil element
instead of html to simplify the example...

--------------------


11.4.5


Detecting Cycles

typo?

'If there is a dependency cycle, The propagation path will...'
->
'If there is a dependency cycle, the propagation path will...'?



-----------------

Event sensitivity


<html ...>
....
<audio src="bounce.wav" begin="foo.click" 
        end="foo.click+3s" restart="whenNotActive"/>
....
</html>

and

<html ...>
....
<audio src="bounce.wav" begin="foo.click" dur="3s"
        restart="whenNotActive"/>
....
</html>



-> html? smil?
-> 
see comment (1) correspondingly


-----------------

Hyperlinks and timing

'Note that the begin time may be resolved as a result of an earlier 
hyperlink, DOM or event activation.'

-> the CSS box for this informative indicated container
covers some normative text on top and below.
-> change styling...


-----------------------

'<html ...>
....
<par begin="0">
   <img id="A" begin="10s" .../>
   <img id="B" begin="A.begin+5s" .../>
   <img id="C" begin="B.click" .../>
   <img id="D" begin="C.begin+5s" .../>
   ...
   <a href="#D">Begin image D</a>
</par>
....
</html>'

-> html? smil?
-> 
see comment (1) correspondingly

-----------------------

Propagating changes to times

'If an element ends later than its specified end time 
(e.g. if a negative offset is specified with a user event), 
the propagated time must be the computed time and not 
the observed time.
If an element ends earlier than its specified end time 
(e.g. if a parent time container constraint cuts short the element, 
or a DOM method call ends the element), the propagated time 
must be the constrained time.'

-> the CSS boxes for the informative indicated containers
cover some normative text on top and below.
-> change styling...

-------------------

'<html ...>
....
<par>
   <img id="img1" dur="10s" end="click" .../>
   <video begin="img1.end-3s" restart="whenNotActive" .../>
</par>
....
</html>'

-> html? smil?
-> 
see comment (1) correspondingly

-------------------

Time container constraints on child durations

typo?

'When the par repeats the first time, 
everything has happens just as it did the first time.'

-> '... everything happens ...'?

-------------------

11.5.1

'A typical example is that the document is displayed on a screen.'
and some more:
-> the CSS boxes for the informative indicated containers
cover some normative text on top and below.
-> change styling...

------------

11.5.3

'For example, host language designers may not define 
error recovery semantics for missing or erroneous values 
in the begin or end attribute values.'

-> the CSS box for this informative indicated container
covers some normative text on top and below.
-> change styling...


-----------------
11.7


UTC: Coordinated Universal Time

'
"Universal Time" (abbreviated UT) is sometimes also referred to 
as "Greenwich Mean Time" (abbreviated GMT). 
The two terms are often used loosely to refer to time kept on 
the Greenwich meridian (longitude zero), five hours ahead of 
Eastern Standard Time. Times given in UT are almost always given 
in terms of a 24-hour clock. Thus, 14:42 is 2:42 p.m., and 21:17 
is 9:17 p.m.
'

-> As far as I know, GMT is a historical outdated time format,
UT is a little bit newer but outdated too since 1968 as a pure
time standard, it would be confusing to use UT as 
abbreviation for UTC ;o)
The current versions are called UTC and TAI.
UTC is roughly a weighted average of high precision atomic
clocks from several countries (TAI), adjusted sometimes to 
the rotation of the earth (UT).
-> see for example wikipedia or other sources...
-> maybe refer to an informative reference for UTC

-> I searched for 'UT' in this chapter but outside this
definition paragraph I found only 'UTC', maybe useful to
replace this paragraph:

'UTC is the current atomic time standard based on TAI 
(International Atomic Time) and a leap second relation to 
UT (Universal Time, based on the rotation of the earth; 
similar to the outdated GMT, Greenwich Mean Time).
Times given in UTC are almost always given in terms of a 
24-hour clock. 
Thus, 14:42 is 2:42 p.m., and 21:17 is 9:17 p.m.'


------------------
11.9.5


'<html ...>
....
<seq repeatCount="10" end="stopBtn.click">
   <img src="img1.jpg" dur="2s" />
   <img src="img2.jpg" dur="2s" />
   <img src="img3.jpg" dur="2s" />
</seq>
....
</html>'

-> html? smil?
-> 
see comment (1) correspondingly



------------------
11.11.2

typo?

'... time.begin ...'

-> missing whitespace
-> '... time. begin ...'
Received on Sunday, 19 August 2007 13:49:36 UTC

This archive was generated by hypermail 2.3.1 : Wednesday, 10 December 2014 20:03:18 UTC