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<Paper uid="A97-1039">
  <Title>A Fast and Portable Realizer for Text Generation Systems</Title>
  <Section position="3" start_page="265" end_page="265" type="intro">
    <SectionTitle>
3 System Architecture
</SectionTitle>
    <Paragraph position="0"> The architecture of REALPRO is based on Meaning-Text Theory, which posits a sequence of correspondences between different levels of representation.</Paragraph>
    <Paragraph position="1"> In REALPRO, each transformation is handled by a separate module. REALPRo is really a realizer shell, which allows for a (run-time) configuration using specially formatted Linguistic Knowledge Bases (LKBs) which state grammar rules, lexical entries, and feature defaults. Each module draws on one or several LKBs. The lexicon is an LKB which is used by all components. Figure 3 shows the architecture.</Paragraph>
    <Paragraph position="2"> * First, the input DSyntS is checked for syntactic validity and default features from the Default Feature Specification are added.</Paragraph>
    <Paragraph position="3"> * The Deep-Syntactic Component takes as input a DSyntS. Using the DSynt grammar and the lexicon, it inserts function words (such as auxiliaries and governed prepositions), and produces a second dependency tree, the surface-syntactic structure or SSyntS, with more specialized arc labels.</Paragraph>
  </Section>
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