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<Paper uid="C94-2192">
  <Title>Breaking Down Rhetorical Relations for the purpose of Analysing Discourse Structures</Title>
  <Section position="2" start_page="0" end_page="0" type="intro">
    <SectionTitle>
1 Introduction
</SectionTitle>
    <Paragraph position="0"> The lthetorieal Strucl;ure The(,ry (lIST) by Mann and Thompson \[Manu and Thoml)SOn , 1.&lt;)87\] is a t;hcory of int,er-s&lt;ml,eni,ial (or inter:clausal) )'elationships in a text. All;hough RS'\[' is int;ended to serve both as a framework for taxi, analysis and l,ext generation, it has so flu' been used exclusiw~ly in |;exl, generation \[Hovy et al., 1992} \[Linden et al., 1(,)92\] \[Ri;sner and Stede, i992\]. Several resea.rehers recognise that RST has de%ors as an analyti&lt;:al frame.work. Moore and Pollack \[Moore and Pollack, 19921, for example, claim that the assmul)tion of a single relation bel.ween discourse el-CIIICtL|,S is Olle &lt;)\[&amp;quot; I,he reasons why lIST analyses are inherently ambiguous. They also claim that the under: s\[)ecilieil,y of the rhel;orieal relal,ion delinil,ions causes problems, Our elaim is thai, the main cause ()17 I,he di\[liculties of applying liST t;o t;exl; i)rocessing systems is that SOlile of the relat;ions are delined on the basis of l;he elfeets which they have OIL a reader, This is particularly the case for the relations classitied as prcseulatioual rclalion.s, the relal;ions whose intended etfects are to increase some inclination in a reader.</Paragraph>
    <Paragraph position="1"> I),ackgrotmd relatiolh for examph;, is defined as a relation whose Satellite increases the al)ility of a reader tO (;()lLll)reh(~lld all elelnelll, in Nucleus and the reader will not tully comprehend Nucleus before reading the t,ext; of Satellite, This delinition is problematic because there are many ways of increasing the ability of a reader to comprehend Nucleus. More seriously, \[,he delinition *Supporte.d by Old Elcctri(: Industry Co., btd.</Paragraph>
    <Paragraph position="2"> itself does not predict anything about textual forlus of Nucleus and Satellite.</Paragraph>
    <Paragraph position="3"> In order to use RST in actual text processing systems, we have to break down st&lt;('.h detinitions to relate them with I,extual forms. In this paper, we show how the defitfitions can be broken down and be ass()eiated wil;h semaul;ic consl;raints betweell eonstituelg,S (clauses), in order t,o relate them with constraints on surface linguisl,ic forms. Among tile 24 rhetorical relations detined in \[Mann and Thompson, 1987\], we focus on presentational relations (7 relations are elassilied as such) which are the most prol)lematic. The re.suits of al)plying our met;hod t&lt;) leading ari;icles in a aal)anesc newspal)er are also discussed.</Paragraph>
  </Section>
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