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<Paper uid="P95-1048">
  <Title>Semantic Information Preprocessing for Natural Language Interfaces to Databases</Title>
  <Section position="2" start_page="0" end_page="0" type="intro">
    <SectionTitle>
1 Introduction
</SectionTitle>
    <Paragraph position="0"> An approach is described for supplying selectional restrictions to parsers in natural language interfaces (NLIs) to databases. The work is based on Linguistic Domain Theories (LDTs) (Rayner, 1993). In our approach, we propose a restricted version of LDTs (RLDTs), that can be normalized and in normalized form used to construct selectional restrictions. We assume that semantic description of NLIs is described by such an RLDT.</Paragraph>
    <Paragraph position="1"> The outline of the paper is as follows. Section 2 provides a brief summary of original LDTs, illustrates how Abductive Equivalential Translation (AET) (Rayner, 1993) can use them at run-time, and describes RLDTs. Sections 3 and 4 describe off-line processes - the normalization process and the extraction of selectional restrictions from normalized RLDTs respectively. Section 5 contains discussion, including related and future work.</Paragraph>
  </Section>
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