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<Paper uid="P88-1025">
  <Title>SYNTACTIC APPROACHES TO AUTOMATIC BOOK INDEXING</Title>
  <Section position="3" start_page="0" end_page="0" type="intro">
    <SectionTitle>
INTRODUCTION
</SectionTitle>
    <Paragraph position="0"> Book indexing is of wide practical interest to authors, publishers, and readers of printed materials. For present purposes, a standard entry in a book index may be assumed to be a nominal construction listed in normal phrase order, or appearing in some permuted form with the. principal term as phrase head, Cross-references (&amp;quot;see&amp;quot; or &amp;quot;see also&amp;quot; entries) between index entries are also normally used in the index.</Paragraph>
    <Paragraph position="1"> Excerpts from two typical book indexes appear in Fig. 1.</Paragraph>
    <Paragraph position="2"> Attempts have been made over the years to mechanize the book indexing task, based in part on the occurrence characteristics of certain content words in the document texts \[Borko, 1970\], and in part on more ambitious syntactic methodologies.</Paragraph>
    <Paragraph position="3"> \[Dillon, 1983\] However, as of now, completely viable automatic book indexing methods are not available. Two main This study was supported in part by a grant from OCLC Inc.. and in part by the National Science Foundation under grant \[R\[-87-02735.</Paragraph>
    <Paragraph position="4"> research advances may, however, lead to the development of improved automatic book indexing procedures. These include the generation of advanced syntactic analysis procedures, capable of analyzing unrestricted English texts, as well as the construction of powerful automatic indexing systems using sophisticated term weighting systems to assess the importance of the indexing units. \[Salton 1975a, 1975b\] By joining the available linguistic procedures with the available know-how in automatic indexing, satisfactory book indexing systems may be developed.</Paragraph>
  </Section>
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