Re: Questions Regarding SMIL Linking

>What does it mean to have a link around either a <PAR> or <SEQ> block? 
>(something that is legal in the current spec)

It means that the link is associated with all elements within the <par> or
<seq>.

Example:

<a href="http://www.w3.org">
  <par>
     <video href="rtsp://www.w3.org/video" />
     <text  href="http://www.w3.org/text.html" />
  </par>
</a>

is equivalent to

  <par>
     <a href="http://www.w3.org">
       <video href="rtsp://www.w3.org/video" />
     </a>
     <a href="http://www.w3.org">
      <text  href="http://www.w3.org/text.html" />
     </a>
  </par>

>Does it make sense to have a link around a <TUNER>? (something that is not 
>legal)

I don't think so. Why do you ask ?

>What about my proposed <FRAME>?

Let me understand that proposal first before I give you an answer to
this.

>In the second out-of-line link example, the link references to a single 
>video in the middle of a <PAR>.  Is this different from referencing the 
><PAR itself?  Is there a case where it might be different?

In this example, there is indeed no difference.
It would be different, however, if the video began later than the 
<par> element. Then, the presentation would be started when the video
begins, and not when the par begins.

The following example shows how this works. It is derived from the example
in the SMIL draft specification.

Presentation A: 

....
<anchor role="dst" href="http://www.cwi.nl/mm/presentationB#next"/>
...

Presentation B:

<seq>
  ...
  <par>
    <video href="rtsp://foo.com/timbl.rm" loc="l_window"/>
    <video begin="5s" id="next" href="rtsp://foo.com/v1.rm" loc="r_window"/>
                      ^^^^^^^^^
    <text href="rtsp://foo.com/caption1.html" loc="l_2_title"/>
    <text href="rtsp://foo.com/caption2.rtx" loc="r_2_title"/>
  </par>
</seq>
...