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<Paper uid="E93-1018">
  <Title>A unification-based approach to multiple VP Ellipsis resolution*</Title>
  <Section position="10" start_page="146" end_page="146" type="concl">
    <SectionTitle>
8 Conclusion
</SectionTitle>
    <Paragraph position="0"> A model has been proposed of how discourse structure influences multiple VPE resolution. However, the suggestion is that the analysis generalises to all cases of VPE, that is, that discourse structure is one of the main factors determining VPE resolution in general. In this sense, the analysis proposed here fits well with one of the mainstream idea in discourse theory, which is that discourse structure constrains anaphora resolution. It should also be pointed out that this analysis includes a treatment of parallelism similar to that developed in \[Asher forthcoming\] and is as such likely to be compatible with the treatment of sloppy/strict ambiguity proposed there.</Paragraph>
    <Paragraph position="1"> The.model proposed is characterised by two main properties: reversibility and monostratality. It is reversible because it is characterised in a purely declarative manner. Note in particular that the definition of structural identity is entirely independent of any notion of processing and is as such strictly declarative. In practical terms, this means that this model can be used both for analysis and for generation. Monostratality (i.e the fact that different levels of linguistic information can be stated within a category) is another important aspect of the model in that it allows for different knowledge sources to interact in determining VPE acceptability and resolution. A typical example of this interaction is involved in the treatment of cases of multiple VPE involving semantically equivalent wffs: in such cases, syntax often interacts with discourse information to determine the correct resolution. More generally, it can be argued that VPE is a phenomenon which simultaneously involves phonology, syntax, semantics and discourse (cf. \[Lappin and McCord 1990\], \[Gardent 1991\]). The present model allows for such a simultaneous interaction and thus improves on serial models of VPE resolution (i.e. models where the various levels of linguistic information interact in a serial rather than a simultaneous fashion) such as \[Webber 1978\].</Paragraph>
    <Paragraph position="2"> The model described in this paper has been implemented in SICSTUS PROLOG and runs on a SUN 4 computer, It has been tested in analysis as well as in generation mode.</Paragraph>
    <Paragraph position="3"> Acknolwedgements: I would like to thank Martin van den Berg, Patrick Blackburn, Remko Scha and Henk Zeevat for many helpful comments and suggestions.</Paragraph>
  </Section>
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