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<Paper uid="E91-1020">
  <Title>STRUCTURE-DRIVEN GENERATION FROM SEPARATE SEMANTIC REPRESENTATIONS</Title>
  <Section position="6" start_page="0" end_page="0" type="concl">
    <SectionTitle>
CONCLUSION
</SectionTitle>
    <Paragraph position="0"> The adaptation of a GPSG-based generator to an MT system using FAS as its SRL was described as an instance of the separate-semantics approach to surface generation. In this instance, the OSS is most efficiently built top-down whereas feature instmltiation is performed bottom-up.</Paragraph>
    <Paragraph position="1"> The mapping based on PA rules has proved to be efficient in practice. There are only a few cases where backtracking is required; most often the local FAS tree being verbalized allows together with the contents of the auxiliary storage and the current set of attachment points for a deterministic choice of grammar rules.</Paragraph>
    <Paragraph position="2"> The generator has been fully implemented and tested with middle-sized fragments of English and German. It is part of the Berlin MT system and runs on both an IBM 4381 under VM/SP in Waterloo Core Prolog and a PC XT/AT in Arity Prolog. Compared to algorithms based on an integrated semantics the separate-semantics approach pursued here is promising if the generator has to be adapted to the SRL of some application system. Adaptation then consists in modifying the set of PA rules rather than in rewriting the grammar.</Paragraph>
  </Section>
class="xml-element"></Paper>