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<Paper uid="W06-1408">
  <Title>Generating References to Parts of Recursively Structured Objects Helmut Horacek Universit t des Saarlandes</Title>
  <Section position="8" start_page="53" end_page="53" type="concl">
    <SectionTitle>
5 Conclusion and Discussion
</SectionTitle>
    <Paragraph position="0"> In this paper, we have presented an approach to generating referring expressions that identify components of recursively structured objects.</Paragraph>
    <Paragraph position="1"> Known techniques are enhanced by measures building metonymic expressions, descriptors expressing positions relative to some subgroup of object components, and exploiting the effect of implicatures due to cardinality and position descriptors. Concise expressions can be generated, in accordance with those in our corpus. While our elaborations are domain-specific to a certain extent, several parts of our method are also much broader applicable. Metonymic expressions are quite common, and we think that building them within the task of reference generation is superior to doing this in a process thereafter, because this enables an easy computation of the discrminatory power of both alternatives, the implicit and the explicit one.</Paragraph>
    <Paragraph position="2"> Another aspect of broader relevance concerns the effect of implicatures in connection with object subgroups. While the group building itself, which is based on compositions of the relation dominates, is specific to our environment, the techniques to establish preferences among groups and deriving identification from that pertain to other environments. For instance, when a subgroup of two items of some kind is visually identifiable in the context of a few other subgroups with different cardinalities, the two X's would lead to the identification of the subgroup in focus, through the effect of implicature, the group formation being based on local proximity. Thus, only the group formation schema needs to be changed.</Paragraph>
  </Section>
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