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<Paper uid="N06-1018">
  <Title>Understanding Temporal Expressions in Emails</Title>
  <Section position="8" start_page="19970825" end_page="19970825" type="concl">
    <SectionTitle>
6 Conclusion and Future Work
</SectionTitle>
    <Paragraph position="0"> In this paper we have adopted a constraint-based representation of time, Time Calculus for Natural Language (TCNL), to tackle the task of anchoring temporal expressions in a novel genre, emails. We believe that the genre is sufficiently different from newswire texts, and its highly under-specified nature fits well with a constraint-based modeling of human calendars. TCNL also allows for an explicit representation of temporal focus, and many of our intuitions about granularity change and temporal arithe- null matics are encapsulated in its type system and operators. The performance of our anchoring system is significantly better than baseline, and compares favorably with some of the closely related work.</Paragraph>
    <Paragraph position="1"> In the future we will re-examine our focus tracking mechanism (being the most significant source of errors), and possibly treat it as a classification problem (similar to (Mani et al., 2003)). We also need to investigate the disambiguation procedure and possibly migrate the functionality into a separate discourse module. In addition, the co-referencing tendency of noun-modifying expressions could lead to a better way to anchoring this particular type of temporal expressions. Finally we would like to expand our coverage of temporal expressions to include other types of expressions such as recurrence expressions  .</Paragraph>
  </Section>
class="xml-element"></Paper>