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1、InformationSystemDevelopmentandDatabaseDevelopmentInmanyorganizations,databasedevelopmentfromthebeginningofenterprisedatamodeling,datamodelingenterprisesdeterminethescopeofthedatabaseandthegeneralcontent.Thisstepusuallyoccursinanorganization'sinformationsystemplanningproces
2、s,itaimstohelporganizationscreateanoveralldatadescriptionorexplanation,andnotthedesignofaspecificdatabase.Aspecificdatabaseforoneormoreinformationsystemsprovidedataandthecorporatedatamodel(whichmayinvolveanumberofdatabases)describedbytheorganizationmaintainingthescopeofthed
3、ata.Datamodelingintheenterprise,youreviewofthecurrentsystem,theneedtosupportanalysisofthenatureofthebusinessareas,theneedforfurtherdescriptionoftheabstractdata,andplanningoneormoredatabasedevelopmentproject.Figure1showsPineValleyfurniturecompany'senterprisedatamodelofapart.
4、1.1InformationSystemArchitectureAsshowninfigure1,seniordatamodelisonlygeneralinformationsystemarchitecture(ISA)orapartofanorganization'sinformationsystemblueprint.Intheinformationsystemplanning,youcanbuildanenterprisedatamodelasawholeinformationsystemarchitecturepart.Accord
5、ingtoZachman(1987),SowaandZachman(1992)viewsofaninformationsystemarchitectureconsistsofthefollowingsixkeycomponents:Data(Figure1shows,butthereareothermethodsthat).Manipulationofdataprocessing(ofadataflowdiagramcanbeused,withtheobjectmodelmethods,orothersymbolsthat).Networks
6、,whichorganizationsandinorganizationswithitsmaintransmissionofdatabetweenbusinesspartners(itcanconnectthroughthenetworktopologymapandtodemonstrate).Peoplewhodealwiththeimplementationofdataandinformationandisthesourceandreceiver(intheprocessmodelforthedatashowsthatthesendera
7、ndthereceiver).Implementationoftheeventsandtimepoints(theycanusestatetransitiondiagramandothermeans.)Thereasonsfortheincidentanddataprocessingrules(oftenintheformoftextdisplay,buttherearealsoanumberofchartsfortheplanningtoolssuchasdecisiontables).1.2InformationEngineeringIn
8、formationsystemsplannersinaccordancewiththespecificinformationsystemplanningmethod