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<Paper uid="C80-1073">
  <Title>ATNS USED AS A PROCEDURAL DIALOG MODEL</Title>
  <Section position="3" start_page="21" end_page="21" type="metho">
    <SectionTitle>
DO I FIND ...&amp;quot; vs &amp;quot;I DO NOT KNOW ...&amp;quot;,
&amp;quot;I SUPPOSE YOU KNOW ...&amp;quot;); task-oriented
</SectionTitle>
    <Paragraph position="0"> information in order to build up coherent sets of answers (on the basis of a task-model).</Paragraph>
    <Paragraph position="1"> Note that some utterances may serve  --489-several interactional roles (&amp;quot;MAY I ASK YOU ...&amp;quot; uttered at the beginning of a dialog initiates a contact and introduces a question.) Special tests on arcs will recognize this and the corresponding actions will build up an interactional structure according to such multiple roles of constituents. (A way to see them from different perspectives.) Interpretation of Arcs The interactiona+- information represented in an ATN-subnet may be used to plan and to guide the recognition/generation of social/verbal interaction as part of a task-oriented dialog. The information represented on an arc should be used for both, for recognition as well as for planning/generation. The structure of the (sub-)networks is useful in the sense that 'normal' courses of interaction are explicity represented. So they are expected and indicate a kind of interactional coherence of a task-oriented dialog. But speakers may violate such normally respected dialog sequences and they can cope with this fact. It is therefore desirable to make a more flexible use of the information represented in a network. E. g. it seems desirable to calculate a (not yet existing) transition on the basis of task-specific cues and/or utterance cues (for example when a participant reopens an already closed subtask or when he repeats or reopens an already executed move or when he suddenly terminates an interaction. null Further developments It seems desirable to have an extended ATN parser in order to cope with unexpected dialog sequences. In implementing aspects of social/verbal interactions one should examine carefully efforts made 5,9 - to use an ATN in a more flexible way - to combine recognition and generation in an ATN 8, and - to build up several interacting ATNs&amp;quot;.</Paragraph>
  </Section>
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