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<h1>SMIL Timing</h1>
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<p class="intro">Timing is about when to start and when to stop.</p>
<hr />
<h2>Timelines and Timing</h2>
<p>Most SMIL element have timing attributes to define the timeline of the
presentation.</p>
<p>Timing attributes defines the start time and the duration of an element.</p>
<p>The following table lists the possible time formats:</p>
<table class="ex" cellspacing="0" border="1" width="100%" cellpadding="3">
<tr>
<th align="left" valign="top" width="40%">Format</th>
<th align="left" valign="top" width="60%">Examples</th>
</tr>
<tr>
<td valign="top">hh:mm:ss.f</td>
<td valign="top">
1:50:00 (One hour and fifty minutes)<br />
10:50 (Ten minutes and fifty seconds)<br />
10.5 (Ten and a half second)</td>
</tr>
<tr>
<td valign="top">
number<br />
[h|min|s|ms]</td>
<td valign="top">3.5h (Three and a half hour)<br />
3.5min (Three and a half minute)<br />
3.5sec (Three and a half second)<br />
35ms (Thirty-five milliseconds)</td>
</tr>
<tr>
<td valign="top">wallclock<br />
(YYY-MM-DDThh:mm:ss+zone)</td>
<td valign="top">wallclock(2003-08-01T12:10:30+1.00)<br />
(Ten minutes and thirty seconds past twelve, August the first 2003, coordinated universal time plus one hour)</td>
</tr>
</table>
<p>The value "indefinite" can also be used to define never ending loops.</p>
<hr />
<h2>Duration</h2>
<p>The duration (dur="5s") attribute of an element defines how long the element
will be visible:</p>
<table border="1" width="100%" class="ex" cellspacing="0">
<tr><td>
<pre><html>
<head>
<style>.t {behavior: url(#default#time2)}</style>
</head>
<body></pre>
<pre><img class="t" src="image1.jpg" dur="5s" /></pre>
<pre></body>
</html></pre>
</td></tr>
</table>
<p><a target="_blank" href="tryit.asp@filename=trysmil_duration">Click here to try it yourself</a>.</p>
<hr />
<h2>When To Start?</h2>
<p>The begin (begin="2s") defines when the element will be visible (start
playing): <br />
</p>
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<tr><td>
<pre><html>
<head>
<style>.t {behavior: url(#default#time2)}</style>
</head>
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<pre><img class="t" src="image1.jpg" begin="2s" /></pre>
<pre></body>
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<p><a target="_blank" href="tryit.asp@filename=trysmil_begin">Click here to try it yourself</a>.</p>
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