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1、CloudDatabaseManagementTsu-YangWuOpenStandardsforService-BasedDatabaseAccessandIntegrationGridandCloudComputingManagementSandroFioreandGiovanniAloisioeditorsWS-DAIDAISWorkingGroup,workingwithintheOGFhasdevelopedasetofdataaccessandintegrationstandardsfordistributedenvironmentsDatabaseAccessandInte
2、grationServicesOpenGridForumThesestandardsprovideasetofuniformwebservice-basedinterfacesfordataaccess.3WS-DAICorespecification?WS-DAImanagesdataresourcesexposedbyDAIS-basedservicesWebServicesDatabaseAccessandIntegrationServicesdefinesasetofmessagepatternsandpropertiesforaccessingvarioustypesofdat
3、aWS-DAIisthenextendedbyotherspecificationsspecializeaccessforspecifictypesofdataWS-DAIR:WS-DAIforrelationaldatabaseWS-DAIX:WS-DAIforXMLdatabaseWS-DAIRDF(S):WS-DAIforRDFdatabase4TheWS-DAIfamilyofspecifications5WS-DAIInWS-DAIAdatabaseisreferredtoasadataresourceAdataresourcerepresentsanysystemthatca
4、nactasasourceorsinkofdataIthasanabstractnamewhichisrepresentedbyaURIandanaddresswhichshowsthelocationofaresource6WS-DAIWS-DAIspecificationhasfunctionalcategoriesDatadescription:MetadataaboutserviceanddataresourcecapabilitiesDataaccess:DirectaccessinterfacesDatafactory:IndirectaccessinterfacesNote
5、dataaccessanddatafactoryoperationswrapexistingquerylanguagestospecifywhatdataistoberetrieved,insertedormodifiedintheunderlyingdataresources7WS-DAIDataDescriptionProvidingthemetadatathatrepresentsthecharacteristicsofthedatabaseandtheserviceThemetadataareavailableaspropertiesthatcanbereadandsometim
6、esmodified.Example?themessageGetDataResource-PropertyDocumentwillretrievemetadataAbstractNamesAsetofabstractnamesforthedataresourcesthatareavailablethroughthatdataservices.AbstractnamesareuniqueandpersistentnameforadataresourcerepresentedasURIs.8WS-DAIConcurrentAccessAflagindicatingwhetherthedata
7、serviceprovidesconcurrentaccessornot.DataSetMapToretrieveXMLframeworkrepresentingthedataformatsLanguageMapShowsthequerylanguagessupportedbythedataserviceReadable/WritableAflagindicatingwhetherthedataserviceprovidesread
