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<Paper uid="C94-2154">
  <Title>TIIE CORRECT AND EFFICIENT IMI)LI~',MI,N.\[A&amp;quot; '~ TION OF' APPI\[()PRIATENESS SPECIFI(:ATIONS FOR TYPF;D FlgATURI&amp;quot; STRUCTUR\]~,S</Title>
  <Section position="6" start_page="958" end_page="959" type="concl">
    <SectionTitle>
4 CONCLUSIONS
</SectionTitle>
    <Paragraph position="0"> \% havc~ sh,:Y, vu in this i~al),:~r tha.t the kind of consl raints ,:~Xl)r.t~ssihlo Ity api)Vol)rh~,l;or.~ss c~mdit.ions call he imlflemc'.nted iN a i.'actical .,.D, sle\]n e,ul)loyinK typ,M featu r,:'~ st.ru(:t.uf(,s and utdlica.Lion a.s I.he I:,ritna.ry Ol)(U'a,t, ic:,n on t(&gt;;t,l, ur&lt;+ ,'-;t, ruct, ure~. Ilut what. Of IIlOl'(' COIII\[)I(~N l;yp(~ CC'IIH|,F.~LilI|,,q it~v'.)l',.' h~y; r(~enl;ram:ies': \[ntro(IL~ciug reeJH.ra.ncies illl. ,::&lt;rest ralid.s allows E.' the F,O~sihillty of d(~liNiu/,, recursivc l.yl),:~s ~ such a.s the (leli nitkm of append in \[I\]. (;lea\['ly the re ~olv;-~nl.~, o\[ such a. recursiv(~ l.yl)(', could Not I)(~ l,reCOmlfiled a.s r,.~quiI'oxl in Troll.</Paragraph>
    <Paragraph position="1"> Oue might, uew'rtholoss, considm' a l\[OWil\]l\[ f('(Hl(, f a, ll('y- ('OIls t f a hI |S oll llollrecursiv(qy defiltcd l.ypcs. A \])ro/)leul still arises; nantcly, il lhe l'eSo\[va.itts of a Frail, till't1 .qll'tlCI411&amp;quot;(~ ill(:ludcd sonic with a pa.rticu lar r(~onll'all(:y a.nd s()Tn(~ \viLh(',ul, then the (:,.)mliti()ll iliad, a.II resc)lva.uts ha.v(~ th,:~ same shal)(~ would m)lon~e\[' hold. ()ue v.,ottkl l.her(q'or,.~ no(~(l i.o eml)loy a moue COml)l(,x vorsion .r ,a.med (lis.it, f,t:tio, (Ill\], \[12\], tit)I). It. ig (i,.L(~sti,.malfl(~ wh('thef such a.d ditional (:()mpl(~xit.y would I)e justified to 'Our CXl)ericl~(:c is derived l,'imarily flora testi.I&amp;quot; Ihc 'l'loll system (m a tat, her lar&lt;e,e e, ramul;G for (',(!l&gt;lll;lll imfiial vcrh I&gt;lHases, which was wiitt('n I)y I'hhard Ilillrichs a.d Tsum:ko Na, kazawa aud iinl)lclncut,cd by I)clmar McuH_:J's.</Paragraph>
    <Paragraph position="2">  handle this limited class of reentrancyconstraints. null It seems then, that the class of constraints that can be expressed by appropriateness conditions corresponds closely to the class of constraints that can be efficiently preeompiled. We take this as a justification for appropriateness formalisms in general. It makes sense to ~d)straet out the efficiently processable constraints and then allow another mechalfiSm, such as attachments of definite clauses, to express more complex constraints.</Paragraph>
  </Section>
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