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<Paper uid="W97-1506">
  <Title>The ConTroll System as Large Grammar Development Platform</Title>
  <Section position="7" start_page="43" end_page="43" type="concl">
    <SectionTitle>
6 Summing Up
</SectionTitle>
    <Paragraph position="0"> We characterized ConTroll as a system supporting grammars expressed with definite :relations, implicational constraints with complex antecedents, and lexical rules. To achieve an efficient interpretation, implicational constraints are applied in a lazy fashion, and interleaving of execution of the different constraints can be determined by the grammar writer using delays and other directives.</Paragraph>
    <Paragraph position="1"> We focussed on those properties of ConTroll which we take to be indispensable for large scale grammar development: a graphical user interface for data structure visualization, a sophisticated debugging and tracing tool, support for a modular file organization, a special macro treatment, and finally a set of special compilation techniques such as an incremental compiler, a mechanism dealing with lexical rules in an efficient way, and a way to use multiple indexing of grammar constraints for efficient access to large constraint pools.</Paragraph>
  </Section>
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