<?xml version="1.0" standalone="yes"?>
<Paper uid="C94-1061">
  <Title>CONCURRENT IJ~XICAIJZEI) I)EI)ENI)ENCY PARSING: THE ParseTalk MODEL</Title>
  <Section position="2" start_page="0" end_page="0" type="intro">
    <SectionTitle>
1 INTRODUCTION
</SectionTitle>
    <Paragraph position="0"> In this pal)er, we propose a grammar model that combines lexical organization of grammatical knowledge with lexicalized conlrol of the corresponding parser in an object-oriented specification framework. Recent developments in the lield of linguistic grammar theory have already yielded a rigid lexical modularization. This fine-grained decomlx)sit|on of linguistic knowledge can he taken as a starting Ix)int for lexic,'tlized control. Current lexicalized grammars (for instance, IlPSG: Pollard &amp; Sag, 1987; CG: t lcpple, 1992; Lexicalized TAG: Sehabes, Abe|lie &amp; Josh|, 1988), however, still consider lexical items as passive data containcrs whosc content is uniformly inteq)reled by global control mechanisms (e.g., unification, functional composition, tree adjunction). Divmging front these l)remises, we assign full procedural autonomy to lexical units and treat then~ as active lexical processes communicating with each other by message passing. Thus, they dynamically estal)lish heterogcncous communication lines in order to determine each lexical item's funclional role. While the issue of lcxicalized control has early I)ecn investigated in the pauadiem of conceptual parsing (Ricsbeck &amp; Schank, 1978), and word expert parsing in particular (Sinall &amp; Ricger, 1982), these prol)osals am limited in several ways. First, they do not provide any general mechanism f()r the systematic incorporation of grammatical knowledge. Second, they do not supply any organizing facility to R)rmuh|te generalizations over sets of lexical items. Third, lexical communication is based on an entirely inform:l\[ l)rotocol that lacks any grounding in principles of distributed computing. null We intend to remedy these metho(Iological shortconlings by designing a radically texicalized grammar on lhe basis of valency and dependency (these head-oriented notions aheady tigure in different shal)eS in many modem linguistic theories, e.g., kS suhc.'ltegorizations, case frames, thela roles), by introducing inheritance kS a major organizational mechanism (for a survey of at)plying inheritance</Paragraph>
  </Section>
class="xml-element"></Paper>