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  <title>Media Fragments Working Group Teleconference -- 06 Oct
  2010</title>
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  <h1>Media Fragments Working Group Teleconference</h1>

  <h2>06 Oct 2010</h2>

  <p><a href=
  'http://lists.w3.org/Archives/Public/public-media-fragment/2010Oct/0003.html'>
  Agenda</a></p>

  <p>See also: <a href=
  "http://www.w3.org/2010/10/06-mediafrag-irc">IRC log</a></p>

  <h2><a name="attendees" id="attendees">Attendees</a></h2>

  <div class="intro">
    <dl>
      <dt>Present</dt>

      <dd>+39.523.0.aaaa, raphael, +20592aabb, Yves, jackjansen,
      +329331aacc, Davy</dd>

      <dt>Regrets</dt>

      <dd>Erik, Silvia</dd>

      <dt>Chair</dt>

      <dd>Raphael</dd>

      <dt>Scribe</dt>

      <dd>jackjansen</dd>
    </dl>
  </div>

  <h2>Contents</h2>

  <ul>
    <li><a href="#agenda">Topics</a></li>

    <li><a href="#ActionSummary">Summary of Action Items</a></li>
  </ul>
  <hr />

  <div class="meeting">
    <p class='phone'></p>

    <p class='phone'></p>

    <p class='irc'>&lt;<cite>trackbot</cite>&gt; Date: 06 October
    2010</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; Matroska (MKV)</p>

    <p class='irc'>&lt;<cite>Yves</cite>&gt; <a href=
    "http://en.wikipedia.org/wiki/Matroska">http://en.wikipedia.org/wiki/Matroska</a></p>

    <p class='irc'>&lt;<cite>Yves</cite>&gt; scribe: jackjansen</p>

    <p class='irc'>&lt;<cite>Yves</cite>&gt; chair: raphael</p>

    <p class='phone'>1. ADMIN</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; <a href=
    "http://www.w3.org/2010/09/29-mediafrag-minutes.html">http://www.w3.org/2010/09/29-mediafrag-minutes.html</a></p>

    <p class='irc'>&lt;<cite>davy</cite>&gt; +1</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; +1</p>

    <p class='phone'><cite>Raphael:</cite> minutes accepted<br />
    ... keep 183 open, in progress</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; ACTION-185?</p>

    <p class='irc'>&lt;<cite>trackbot</cite>&gt; ACTION-185 -- Yves
    Lafon to book zakim for the 2 days meeting of the group on Mon
    1st and Tue 2nd Nov -- due 2010-09-29 -- OPEN</p>

    <p class='irc'>&lt;<cite>trackbot</cite>&gt; <a href=
    "http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/185">
    http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/185</a></p>

    <p class='phone'><cite>Raphael:</cite> 188 closed, just now
    reminded Jack</p>

    <p class='phone'>2. MEDIA FRAGMENT EXTENSION</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; close
    ACTION-188</p>

    <p class='irc'>&lt;<cite>trackbot</cite>&gt; ACTION-188 Remind
    Jack and Michael to register asap for TPAC closed</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; Raphael:
    summarizing the long thread and discussion about
    extensibility</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; ... and summarizing
    the position of philip</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; Jack: the only
    thing we should say is: if we partially understand a media
    fragment, should we accept or ignore ?</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; ... this is one
    line in the spec</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; ... we should
    accept what is acceptable</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; ... and in
    particular if a media fragment URI can have things we don't
    understand</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; ... and personally
    I don't care about the grammar</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; Yves: we should be
    very caution with extension</p>

    <p class='phone'><cite>Yves:</cite> we should be careful with
    extensions</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; ... e.g. the ref
    redefines an existing dimension</p>

    <p class='phone'><cite>Jack:</cite> explains we could use an
    attribute to control strict or loose parsing</p>

    <p class='phone'><cite>All:</cite> think this is ugly</p>

    <p class='irc'>&lt;<cite>Yves</cite>&gt; :)</p>

    <p class='phone'><cite>Jack:</cite> suggestion: we mandate the
    chair to decide something</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; Jack: I have no
    strong feeling either way</p>

    <p class='phone'><cite>Jack:</cite> I do think (and so does
    Davy) that if we recognize the attribute name then the value
    must adhere to our syntax</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; #t=banana ... means
    parsing stops</p>

    <p class='irc'>&lt;<cite>davy</cite>&gt; #t=10&amp;t=20 ...
    means parsing stops?</p>

    <p class='irc'>&lt;<cite>Yves</cite>&gt; well if you always
    ignore what you don't understand #t=banana&amp;xywh=10,10,20,20
    should be xywh=10,10,20,20</p>

    <p class='irc'>&lt;<cite>davy</cite>&gt; I disagree</p>

    <p class='phone'>That woulnd mean that t=1o&amp;xywh=1,2,3,4
    would parse</p>

    <p class='irc'>&lt;<cite>Yves</cite>&gt; this is what is
    consistent with 'ignoring what you don't understand'</p>

    <p class='irc'>&lt;<cite>Yves</cite>&gt; we have t=npt:120,
    what happens if we have t=&lt;mytimeunit&gt;:120 ?</p>

    <p class='irc'>&lt;<cite>Yves</cite>&gt; we can have
    extensionaxis = extensionname = extensionvalue</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; Jack: we should not
    try to encode in a grammar what we will not understand</p>

    <p class='irc'>&lt;<cite>Yves</cite>&gt; but jack, encoding
    extension points is a good thing to do</p>

    <p class='phone'><cite>Yves:</cite> either we do nothing about
    extension or do it correct, with extensionaxis in the
    grammar<br />
    ... we could check what existing implementations do</p>

    <p class='phone'><cite>Raphael:</cite> they are waiting for us
    to specify correct behaviour<br />
    ... time to adjourn</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; Jack: I suggest the
    chairs put a deadline and take a decision on this issue</p>

    <p class='irc'>&lt;<cite>raphael</cite>&gt; Raphael: I agree, I
    will have a discussion with Erik</p>
  </div>

  <h2><a name="ActionSummary" id="ActionSummary">Summary of Action
  Items</a></h2><!-- Action Items -->
  [End of minutes]<br />
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