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<Paper uid="C94-1058">
  <Title>DEFAULT HANDLING IN INCREMENTAL GENERATION</Title>
  <Section position="5" start_page="360" end_page="361" type="concl">
    <SectionTitle>
4 DISCUSSION
</SectionTitle>
    <Paragraph position="0"> This l)al)er prolmses a. processiug conformh~g default: hau(ller for geueration realizing repair hy non monotouh&amp;quot; changes. We provide the system with def'ault descriptions. The set of default preconditions expresses possil)le rea~  sons for dead-end situations. A default is triggered, if the preconditions match the cu&gt; rent situation and the certainty value of the default exceeds the i)redefined threshold. The default body is expressed in terms of the missing input specification in order to make the system work homogeneously. We have verified the advantages of processing-conforming default handling by implementing a default handler for VM-GEN.</Paragraph>
    <Paragraph position="1"> As future work, we will extend the default preconditions towards handling complex contextual information. We will apply default handling to microplanning and lexical choice within VERBMOBIL. With respect to a sophisticated output, we aim to combine VM(\]I3N with a flexible repair component.</Paragraph>
    <Paragraph position="2"> The system VM-GEN is used in the VI&amp;quot;llB-MOBIL scenario for multilingual generation (English, German, and .Japanese). We mean by multilinguality that; the sa.me processing is applie(l for diflZ'rent languages. In the underlying knowledge sources language-specific constraints are defined. Default handling can be easily adapted to the requirements o\[' multilingual generation \])y using language-si)eci(? ic default-descriptions.</Paragraph>
    <Paragraph position="3"> For all know/edge sources the question arises how knowledge can be shared. We Jut:end t:o use core knowledge so'urccs for representing common phenomena. The core set of (lefault descriptions for F, nglish and German, e.g., contains the description of a reactiol~ i:o a missing mmflmr vahm for a, nou.ll. We ailn to develo I) an efficient storing mechanism using a hierarchy of locally inl;ersectil~g core descriptions. null</Paragraph>
  </Section>
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