<?xml version="1.0"?>
<!DOCTYPE AGSet SYSTEM "ag.dtd">

<!-- Multiple signals of different media types and sampling rates can be
represented, but mediating offsets between them all is the province of
software, and there is a risk of problems caused by these conversions
(e.g. from rounding in floating point representations).  More attention will be
given to these cases once we have gained more experience with them. -->

<AGSet id="MM1" version="1.0" xmlns="http://www.ldc.upenn.edu/atlas/ag/" 
	xmlns:xlink="http://www.w3.org/1999/xlink"
        xmlns:dc="http://purl.org/DC/documents/rec-dces-19990702.htm">

  <Metadata>
    <dc:title>Annotation of a multimedia signal</dc:title>
  </Metadata>

  <Timeline id="T1">
    <Signal id="S1" mimeClass="audio" mimeType="wav" encoding="wav"
        unit="16kHz" xlink:href="audio1.wav"/>
    <Signal id="S2" mimeClass="audio" mimeType="wav" encoding="wav"
        unit="22050Hz" xlink:href="audio2.wav"/>
    <Signal id="S3" mimeClass="video" mimeType="mpeg" encoding="mpeg2"
        unit="sec" xlink:href="video.mpeg"/>
  </Timeline>

  <AG id="t1" type="multimedia" timeline="T1">

    <Anchor id="A0" offset="1.42" unit="sec"/>
    <Anchor id="A1" offset="2.62" unit="sec"/>

    <Anchor id="A2" signals="S1 S2" offset="3000" unit="16kHz"/>
    <Anchor id="A3" signals="S1 S2" offset="4600" unit="16kHz"/>

    <Annotation id="Ann0" type="transcription" start="A0" end="A1">
      <Feature name="trans">event in all three signals</Feature>
    </Annotation>

    <Annotation id="Ann1" type="transcription" start="A2" end="A3">
      <Feature name="trans">event in autido signals</Feature>
    </Annotation>
  </AG>

</AGSet>
