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<Paper uid="N04-4016">
  <Title>Correction Grammars for Error Handling in a Speech Dialog System</Title>
  <Section position="3" start_page="0" end_page="0" type="intro">
    <SectionTitle>
2 CAMMIA Dialog System
</SectionTitle>
    <Paragraph position="0"> Our current approach focuses on dialog systems which incorporate speech recognition modules utilizing regular grammars. The CAMMIA system is an example of such a dialog system (Nyberg et al., 2002).</Paragraph>
    <Paragraph position="1"> The CAMMIA system is a client-server dialog management system based on VoiceXML. Each dialog scenario in this system is described in the format of DialogXML. The system has the initiative in the dialog, and dialogs are oriented around slot-filling for particular queries or requests. The server sends a VoiceXML data file to the client VoiceXML interpreter for a particular dialog turn, compiled from the DialogXML scenario according to the current dialog context. The VoiceXML data includes system prompts, names of grammar files and valid transitions to subsequent dialog states. The client interacts with the user according to the VoiceXML data.</Paragraph>
    <Paragraph position="2"> Figure 2 shows an example of a grammar rule used in the CAMMIA system. The regular grammar rule can be represented as a transition network. The following sentences are recognized by the rule in Figure 2: * I would like to know the weather for Tokyo.</Paragraph>
    <Paragraph position="3"> * I would like to know the weather for Tokyo tomorrow.</Paragraph>
  </Section>
class="xml-element"></Paper>