外文翻译对象技术

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1、ObjectTechnologyObjecttechnologyisanewapproachtodevelopingsoftwarethatallowsprogrammerstocreateobjects,acombinationofdataandprograminstructions.Thisnewtechnologyhasbeensteadilydevelopedsincethelate1960sandpromisestobeoneofthemajoringredientsintheresponsetotheongoingsoftwarecrisis.1.1Introduction

2、toOTThereexistsacriticaltechnologythatischangingthewayweconceive,build,useandevolveourcomputersystems.Itisatechnologythatmanycompaniesareadoptingtoincreasetheirefficiency,reducecostsandadapttoadynamicmarketplace.ItiscalledObjectTechnology(OT).Byallowingtheintegrationofdisparateandnoncompatibleso

3、urce,OThasthepotentialtoprecipitatearevolutionininformationsystemsdesignonaparwiththatcausedincomputerhardwarebytheintroductionofthecomputerchip.YetOTisnotanewphenomenon.Developmentandproductreleaseshavebeenongoingsinceitsoriginmanyyearsago.However,therecentemphasistaskofenterpriseinformationtec

4、hnologyintegrationhasbroughtOTintothespotlight.OTpromisestoprovidecomponent-levelsoftwareobjectsthatcanbequicklycombinedtobuildnewapplicationsthatrespondtochangingbusinessconditions.Onceused,objectsmaybereusedinotherapplications,loweringdevelopmentcostsandspeedingupthedevelopmentprocess.Becauseo

5、bjectscommunicatebysendingmessagesthatcanbeunderstoodbyotherobjects,largeintegratedsystemsareeasiertoassemble.Eachobjectisresponsibleforaspecificfunctionwithineitheranapplicationoradistributedsystem.Thatmeansthatasthebusinesschanges,individualobjectmaybeeasilyupgraded,augmentedorreplaced,leaving

6、therestofthesystemuntouched.Thisdirectlyreducesthecostofmaintenanceandthetimingandextendibilityofnewsystems.1.2OT-basedProductsThecurrentmarketforOT-basedproductscanbedividedintofourmajorsegments:·Languagesandprogrammingtools·Developers’toolkitsXVII·Object-Orienteddatabase·Object-OrientedCASEtoo

7、lsThelargestsegmentofthecurrentmarketforOT-basedproductsislanguagesandprogrammingtools.ProductsinthisareaincludelanguagecompliersforC++,Smalltalk,CommonLispObjectSystem(CLOS),Eiffel,AdaandObjective-C,aswellasextensionstoPASC