A Run-Time Shared Repository for NLP Tools

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1、ARun-TimeSharedRepositoryforNLPToolsJo~aoGra»ca1,NunoJ.Mamede1,andJo~aoD.Pereira2SpokenLanguageSystemsLabRuaAlvesRedol9,1000-029Lisboa,Portugal12LF{INESC-IDLisboa/ISTfjoao.graca,nuno.mamedeg@l2f.inesc-id.pt,2SoftwareEng.Group{INESC-IDLisboajoao@inesc-id.

2、idAbstract.NaturalLanguagesystemsareusuallycomposedbyseveraltoolsexecutedinapipelinedmanner.Thistypeofprocessingpresentssomeproblemscausedbylossofinformationbetweentools.Thispaperpresentsasolutiontothisproblemintheformofasharedrepositoryfornaturallanguag

3、eprocessing.First,relatedarchitecturesaredescribedalongwiththereasonswhytheywerenotchosenasreferencearchitec-tures.ThenwepresentoursolutionintheformofanarchitecturalmodelandthecorrespondingAPI.Resumo.Ossistemasdel¶³nguanaturals~aonormalmentecompostospord

4、iferentesferramentascujaexecu»c~aoseprocessasequencialmente.Estetipodeprocessamentoapresentaproblemasdevidoµaperdadein-forma»c~aoentreferramentas.Esteartigoapresentaumasolu»c~aoparaesteproblemaqueconsistenumreposit¶oriopartilhadodel¶³nguanat-ural.Primeir

5、o,apresentam-searquitecturasrelacionadaseomotivopeloqualestasn~aoforamconsideradascomoarquitecturasderefer^encia.Deseguida,apresenta-seanossasolu»c~aosobaformadeummodeloarqui-tecturalearespectivaAPI.Keywords.Run-TimeRepository,LinguisticAnnotation,Blackb

6、oard.1IntroductionANaturalLanguagesystemiscomposedbyseveraltools,eachperformingaspeci¯ctask.Executingthesystemcorrespondstoexecutingthevarioustoolsinapipelinedmanner(see¯gure1).Thiskindofpipelinearchitecturepresentsthefollowingproblems:{Informationmaybel

7、ostbetweenexecutionsofdi®erenttools:whenPAsMosplitsthecontractiondo"intode"+o",theinformationthattheoriginalwordinthetextwasdo"islosttothefollowingtoolsinthesystem.{Toolsmustensurethatinformationthattheyconsiderirrelevantispassedtotheoutput.Intheexam

8、ple,thesyntacticparserSuSAnamustkeepthewordstemsforfuturetoolsalthoughithasnoneedforthem.Toavoidtheseproblems,oursolutionconsistsofhavingasharedrepositorywhichisthesourceofinput/outputofalltools.Fig.1.Existingsystemchart:S