SIST EN 301 068-4 V1.1.1:2003

• Abstract:

  Develop part 4 (ATS&PIXIT for the user) of EN 301 068

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Mandate: BC-T-338
• Ref Project: ETSI EN 301 068-4 V1.1.1 (2000-10) - Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; ATM transfer capability and traffic parameter indication; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user

SIST EN 301 068-4 V1.1.1:2003 is the Slovenian adoption of ETSI EN 301 068-4 V1.1.1 for the Broadband Integrated Services Digital Network (B-ISDN) Digital Subscriber Signalling System No. two (DSS2) protocol. It specifies the user Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma for connection characteristics, ATM transfer capability and traffic parameter indication. In practice, it is the part of the series used to test and document conformance for the user side at the TB or coincident SB/TB reference point.

What does SIST EN 301 068-4 V1.1.1:2003 specify?

SIST EN 301 068-4 V1.1.1:2003 defines the user-side conformance test material for EN 301 068-1. It focuses on the ATS for implementations at the TB reference point, or at a coincident SB and TB reference point, and points to the related test purposes and network-side parts in the same series.

The document is organized into a short body and three normative annexes:

Annex	What it covers
Annex A	Protocol Conformance Test Report (PCTR) proforma
Annex B	Partial PIXIT proforma
Annex C	Abstract Test Suite (ATS)

The main clauses cover the abstract test method, untestable test purposes, the ATS-to-TP map, and conformance rules for PCTR, PIXIT and the ATS.

What are the key requirements of SIST EN 301 068-4 V1.1.1:2003?

SIST EN 301 068-4 V1.1.1:2003 uses the remote test method for the user ATS. Clause 4 places the Point of Control and Observation (PCO) at the service access point between layers 2 and 3, named L0, so verdicts are based on what the tester sees there. It also introduces an informal operator PCO, O, for coordination actions that guide the test but do not drive verdicts.

Clause 5 states that there are no untestable test purposes for this ATS. That means every test purpose in the suite is intended to be executable and relevant to the conformance campaign.

Clause 6 gives a one-to-one mapping from Test Purpose (TP) identifiers to test case names. For users of the suite, that makes it easier to trace a verdict back to the corresponding TP and report results consistently.

Clause 7 sets the rules for the Protocol Conformance Test Report (PCTR). A test laboratory producing a PCTR must follow the ISO/IEC 9646-5 template and the Annex A proforma, keep the annex clause order, and place any extra columns to the right of the existing ones. In practice, this keeps reports comparable from one lab to another.

Clause 8 sets the rules for the partial PIXIT proforma. A test realizer or test laboratory may add extra questions, but the augmented PIXIT must remain technically equivalent to Annex B. This is the information the lab needs to prepare the Means Of Testing (MOT) for a particular System Under Test (SUT) or Implementation Under Test (IUT).

Clause 9 sets the conformance conditions for the ATS and the executable test suite. An ExTS must contain test groups and test cases technically equivalent to Annex C, and all sequences of abstract test events in each case must be realizable in the executable form. Extra checking by a test system may exist, but it does not affect the verdict for the abstract test case.

Annex B is especially practical because it collects the configuration to be tested, test management timers, and parameter values such as ATM traffic descriptor coding, bearer capability coding, and preferred VPCI and VCI values.

What terms does SIST EN 301 068-4 V1.1.1:2003 define?

• Abstract Test Method (ATM) - The test method used to structure how the ATS is applied to the IUT.
• Abstract Test Suite (ATS) - The set of abstract test cases used to assess conformance.
• Implementation Under Test (IUT) - The protocol implementation being examined for conformance.
• System Under Test (SUT) - The broader system that contains the IUT in the test setup.
• Protocol Implementation eXtra Information for Testing (PIXIT) - The extra implementation-specific information needed to prepare testing.
• Point of Control and Observation (PCO) - The point where the tester controls and observes behavior.
• Test Purpose (TP) - The statement of what each test case is intended to verify.

Who uses SIST EN 301 068-4 V1.1.1:2003?

This standard is used by test laboratories, test realizers, and implementers of B-ISDN DSS2 user-side equipment. It is also relevant to clients who request conformance testing and need a PCTR that follows the prescribed format.

In practice, it supports protocol conformance assessment for equipment at the user side of the B-ISDN user-network interface, especially where the implementation must be tested against EN 301 068-1 using the defined ATS and PIXIT information.

Which standards are used with SIST EN 301 068-4 V1.1.1:2003?

• EN 301 068-1 - Provides the protocol specification being tested.
• EN 301 068-2 - Provides the PICS proforma for the same protocol family.
• EN 300 443-1 - Supplies related DSS2 user-network layer 3 definitions used by the document.
• EN 300 443-2 - Supplies the related PICS proforma referenced by Annex B.
• ISO/IEC 9646-1 - Provides the general conformance testing concepts and key definitions.
• ISO/IEC 9646-2 - Provides the ATS specification framework.
• ISO/IEC 9646-3 - Provides Tree and Tabular Combined Notation (TTCN).
• ISO/IEC 9646-4 - Provides test realization rules for executable test suites and PIXIT handling.
• ISO/IEC 9646-5 - Provides requirements for test laboratories and PCTR structure.
• ITU-T Recommendation I.413 - Defines the B-ISDN user-network interface reference points used in the scope.

What does the SIST EN 301 068-4 V1.1.1:2003 document contain?

Annex A gives a structured PCTR form with identification, test environment, conformance status, static and dynamic summary, and a test campaign report section. Annex B gives the PIXIT questions for laboratory, client, SUT, protocol identification, configuration to be tested, timers, and parameter values.

Annex C contains the ATS in TTCN form. The document states that the ATS is provided in both TTCN.GR and TTCN.MP, and that the two forms are equivalent. The annex also notes that the ATS includes a test suite overview part with extra information and references.

The body of the document explains how the suite is applied, how test purposes map to test cases, and how reports and executable test suites are checked for conformance.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Connection characteristics; ATM transfer capability and traffic parameter indication; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 301 068-4 Version 1.1.1SIST EN 301 068-4 V1.1.1:2003en01-december-2003SIST EN 301 068-4 V1.1.1:2003SLOVENSKI
STANDARD
ETSIEN301068-4V1.1.1(2000-10)EuropeanStandard(Telecommunicationsseries)BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Connectioncharacteristics;ATMtransfercapabilityandtrafficparameterindication;Part4:AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationfortheuserSIST EN 301 068-4 V1.1.1:2003

ETSIETSIEN301068-4V1.1.1(2000-10)2ReferenceDEN/SPAN-05150-4KeywordsB-ISDN,DSS2,ATM,testing,ATS,PIXIT,UNIETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 301 068-4 V1.1.1:2003

ETSIETSIEN301068-4V1.1.1(2000-10)3ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.63Definitionsandabbreviations.73.1Definitions.73.1.1Definitionsrelatedtoconformancetesting.73.1.2DefinitionsrelatedtoEN301068-1.73.2Abbreviations.84AbstractTestMethod(ATM).95Untestabletestpurposes.96ATStoTPmap.97PCTRconformance.98PIXITconformance.109ATSConformance.10AnnexA(normative):ProtocolConformanceTestReport(PCTR)proforma.11A.1Identificationsummary.11A.1.1Protocolconformancetestreport.11A.1.2IUTidentification.11A.1.3Testingenvironment.11A.1.4Limitsandreservations.12A.1.5Comments.12A.2IUTConformancestatus.12A.3Staticconformancesummary.12A.4Dynamicconformancesummary.12A.5Staticconformancereviewreport.13A.6Testcampaignreport.13A.7Observations.14AnnexB(normative):PartialPIXITproforma.15B.1Identificationsummary.15B.2Abstracttestsuitesummary.15B.3Testlaboratory.15B.4Client(oftheTestLaboratory).16B.5SUT.16B.6Protocolinformation.17B.6.1Protocolidentification.17B.6.2Configurationtobetested.17B.6.3Testmanagementtimers.17B.6.4ParameterValues.18SIST EN 301 068-4 V1.1.1:2003

ETSIETSIEN301068-4V1.1.1(2000-10)4AnnexC(normative):AbstractTestSuite(ATS).19C.1TheTTCNGraphicalform(TTCN.GR).19C.2TheTTCNMachineProcessableform(TTCN.MP).19Bibliography.20History.21SIST EN 301 068-4 V1.1.1:2003

ETSIETSIEN301068-4V1.1.1(2000-10)5IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinETSISR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinETSISR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyETSITechnicalCommitteeServicesandProtocolsforAdvancedNetworks(SPAN).Thepresentdocumentispart4ofamulti-partdeliverablecoveringtheDigitalSubscriberSignallingSystemNo.2(DSS2)protocolspecificationfortheB-ISDNATMtransfercapabilityandtrafficparameterindication,asidentifiedbelow:Part1:"Protocolspecification[ITU-TRecommendationsQ.2961.1(1995),Q.2961.2(1997),Q.2961.3(1997),Q.2961.4(1997),modified]";Part2:"ProtocolImplementationConformanceStatement(PICS)proformaspecification";Part3:"TestSuiteStructureandTestPurposes(TSS&TP)specificationfortheuser";Part4:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationfortheuser";Part5:"TestSuiteStructureandTestPurposes(TSS&TP)specificationforthenetwork";Part6:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforthenetwork".NationaltranspositiondatesDateofadoptionofthisEN:6October2000DateoflatestannouncementofthisEN(doa):31January2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31July2001DateofwithdrawalofanyconflictingNationalStandard(dow):31July2001SIST EN 301 068-4 V1.1.1:2003

ETSIETSIEN301068-4V1.1.1(2000-10)61ScopeThisfourthpartofEN301068specifiestheuserAbstractTestSuite(ATS)fortheTBreferencepointorcoincidentSBandTBreferencepoint(asdefinedinITU-TRecommendationI.413[6])ofimplementationsconformingtothestandardsforthesignallinguser-networklayer3specificationforATMtransfercapabilityandtrafficparameterindicationoftheDigitalSubscriberSignallingSystemNo.two(DSS2)protocolforthepan-EuropeanBroadbandIntegratedServicesDigitalNetwork(B-ISDN),EN301068-1[1].AfurtherpartofthepresentdocumentspecifiestheTestSuiteStructureandTestPurposes(TSS&TP)relatedtothisATSandpartialPIXITproforma.OtherpartsspecifytheTSS&TPandtheATSandpartialPIXITproformafortheNetworksideoftheTBreferencepointorcoincidentSBandTBreferencepointofimplementationsconformingtoEN301068-1[1].2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.[1]ETSIEN301068-1:"BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Connectioncharacteristics;ATMtransfercapabilityandtrafficparameterindication;Part1:Protocolspecification[ITU-TRecommendationsQ.2961.1(1995),Q.2961.2(1997),Q.2961.3(1997),Q.2961.4(1997),modified]".[2]ETSIEN301068-2:"BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;Connectioncharacteristics;ATMtransfercapabilityandtrafficparameterindication;Part2:ProtocolImplementationConformanceStatement(PICS)proformaspecification".[3]ISO/IEC9646-1:"Informationtechnology;OpenSystemsInterconnection;Conformancetestingmethodologyandframework;Part1:Generalconcepts".[4]ISO/IEC9646-2:"Informationtechnology;OpenSystemsInterconnection;Conformancetestingmethodologyandframework;Part2:AbstractTestSuitespecification".[5]ISO/IEC9646-3:"Informationtechnology;OpenSystemsInterconnection;Conformancetestingmethodologyandframework;Part3:TheTreeandTabularCombinedNotation(TTCN)".[6]ITU-TRecommendationI.413(1993):"B-ISDNuser-networkinterface".[7]ETSIEN300443-1:"BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;B-ISDNuser-networkinterfacelayer3specificationforbasiccall/bearercontrol;Part1:Protocolspecification[ITU-TRecommendationQ.2931(1995),modified]".[8]ISO/IEC9646-4:"Informationtechnology;OpenSystemsInterconnection;Conformancetestingmethodologyandframework;Part4:Testrealization".[9]ISO/IEC9646-5:"Informationtechnology;OpenSystemsInterconnection;Conformancetestingmethodologyandframework;Part5:Requirementsontestlaboratoriesandclientsfortheconformanceassessmentprocess".SIST EN 301 068-4 V1.1.1:2003

ETSIETSIEN301068-4V1.1.1(2000-10)7[10]ETSIEN300443-2:"BroadbandIntegratedServicesDigitalNetwork(B-ISDN);DigitalSubscriberSignallingSystemNo.two(DSS2)protocol;B-ISDNuser-networkinterfacelayer3specificationforbasiccall/bearercontrol;Part2:ProtocolImplementationConformanceStatement(PICS)proformaspecification".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply,inadditiontothosegiveninEN301068-1[1]andEN300443-1[7].3.1.1DefinitionsrelatedtoconformancetestingAbstracttestcase:refertoISO/IEC9646-1[3]AbstractTestMethod(ATM):refertoISO/IEC9646-1[3]AbstractTestSuite(ATS):refertoISO/IEC9646-1[3]ImplementationUnderTest(IUT):refertoISO/IEC9646-1[3]SystemUnderTest(SUT):seeISO/IEC9646-1[3]UpperTester(UT):seeISO/IEC9646-1[3]Lowertester:refertoISO/IEC9646-1[3]ProtocolImplementationConformanceStatement(PICS):refertoISO/IEC9646-1[3]PICSproforma:refertoISO/IEC9646-1[3]ProtocolImplementationeXtraInformationforTesting(PIXIT):refertoISO/IEC9646-1[3]PIXITproforma:refertoISO/IEC9646-1[3]TestPurpose(TP):refertoISO/IEC9646-1[3]PointofControlandObservation(PCO):seeISO/IEC9646-1[3]3.1.2DefinitionsrelatedtoEN301068-1user:DSS2protocolentityattheUsersideoftheuser-networkinterfacewhereaTBreferencepointorcoincidentSBandTBreferencepointappliesuser(SB/TB):DSS2protocolentityattheUsersideoftheuser-networkinterfacewhereacoincidentSBandTBreferencepointappliesuser(TB):DSS2protocolentityattheUsersideoftheuser-networkinterfacewhereaTBreferencepointapplies(userisaprivateISDN)SIST EN 301 068-4 V1.1.1:2003

ETSIETSIEN301068-4V1.1.1(2000-10)83.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:ATMAbstractTestMethodATSAbstractTestSuiteB-ISDNBroadbandIntegratedServicesDigitalNetworkCRCallReferenceDSS2DigitalSubscriberSignallingSystemNo.twoIE_flagInformationelementinstructionindicatorflagIE_AIInformationelementactionindicatorIUTImplementationUnderTestPCRPeakCellRatePICSProtocolImplementationConformanceStatementPIXITProtocolImplementationeXtraInformationforTestingTSSTestSuiteStructureExTSExecutableTestSuiteLTLowerTesterMOTMeansOfTestingPCOPointofControlandObservationPDUProtocolDataUnitSUTSystemUnderTestTPTestPurposeTTCNTreeandTabularCombinedNotationUTUpperTesterU0NulllinkstateU1CallInitiatedlinkstateU3OutgoingCallProceedinglinkstateU4CallDeliveredlinkstateU6CallPresentlinkstateU7CallReceivedlinkstateU8ConnectRequestlinkstateU9IncomingCallProceedinglinkstateU10ActivelinkstateU12DisconnectIndicationcallstateU13ModifyRequestedcallstateU14ModifyReceivedcallstateVCVirtualChannelVCIVirtualChannelIdentifierVPCVirtualPathConnectionVPCIVirtualPathConnectionIdentifierVPVirtualPathVPIVirtualPathIdentifierSIST EN 301 068-4 V1.1.1:2003

ETSIETSIEN301068-4V1.1.1(2000-10)94AbstractTestMethod(ATM)TheremotetestmethodisappliedfortheuserATS.ThePointofControlandObservation(PCO)residesattheserviceaccesspointbetweenlayers2and3.ThisPCOisnamed"L0"(forLower).TheL0PCOisusedtocontrolandobservethebehaviouroftheImplementationUnderTest(IUT)andtestcaseverdictsareassigneddependingonthebehaviourobservedatthisPCO.TesterSUTLTIUTPCOLayer2Layer2Layer1Layer1ServiceproviderFigure1:RemotetestmethodISO/IEC9646-2[4]allowstheinformalexpressionofTestCo-ordinationProcedures(TCP)betweentheSystemUnderTest(SUT)upperlayer(s)andtheLowerTester(LT).IntheATScontainedinannexC,TCPisachievedbyuseofasecond"informal"PCO,called"O"(forOperator).ThisPCOisusedtospecifycontrolbutnotobservationabovetheIUTandconsequently,eventsatthisPCOareneverusedtogeneratetestcaseverdicts.TheuseofthisOPCOisregardedasapreferredalternativetotheuseoftheimplicitsendevent,inthatitallowstheATStospecifyinaclearandmeaningfulwaywhatactionsarerequiredtobeperformedontheIUT.5UntestabletestpurposesTherearenountestabletestpurposesassociatedwiththisATS.6ATStoTPmapTheidentifiersusedfortheTPsarereusedastestcasenames.Thusthereisastraightforwardone-to-onemapping.7PCTRconformanceAtestlaboratory,whenrequestedbyaclienttoproduceaPCTR,isrequired,asspecifiedinISO/IEC9646-5[9],toproduceaPCTRconformantwiththePCTRtemplategiveninannexBofISO/IEC9646-5[9].Furthermore,atestlaboratory,offeringtestingfortheATSspecificationcontainedinannexC,whenrequestedbyaclienttoproduceaPCTR,isrequiredtoproduceaPCTRconformantwiththePCTRproformacontainedinannexAofthepresentdocument.APCTRwhichconformstothisPCTRproformaspecificationshallpreservethecontentandorderingoftheclausescontainedinannexA.ClauseA.6ofthePCTRmaycontainadditionalcolumns.Ifincluded,theseshallbeplacedtotherightoftheexistingcolumns.Textinitalicsmayberetainedbythetestlaboratory.SIST EN 301 068-4 V1.1.1:2003

ETSIETSIEN301068-4V1.1.1(2000-10)108PIXITconformanceAtestrealizer,producinganexecutabletestsuitefortheAbstractTestSuite(ATS)specificationcontainedinannexC,isrequired,asspecifiedinISO/IEC9646-4[8],toproduceanaugmentedpartialPIXITproformaconformantwiththispartialPIXITproformaspecification.AnaugmentedpartialPIXITproformawhichconformstothispartialPIXITproformaspecificationshall,asaminimum,havecontentswhicharetechnicallyequivalenttoannexB.TheaugmentedpartialPIXITproformamaycontainadditionalquestionsthatneedtobeansweredinordertopreparetheMeansOfTesting(MOT)foraparticularImplementationUnderTest(IUT).Atestlaboratory,offeringtestingfortheATSspecificationcontainedinannexC,isrequired,asspecifiedinISO/IEC9646-5[9],tofurtheraugmenttheaugmentedpartialPIXITproformatoproduceaPIXITproformaconformantwiththispartialPIXITproformaspecification.APIXITproformawhichconformstothispartialPIXITproformaspecificationshall,asaminimum,havecontentswhicharetechnicallyequivalenttoannexB.ThePIXITproformamaycontainadditionalquestionsthatneedtobeansweredinordertopreparethetestlaboratoryforaparticularIUT.9ATSConformanceThetestrealizer,producingaMeansOfTesting(MOT)andExecutableTestSuite(ExTS)forthisAbstractTestSuite(ATS)specification,shallcomplywiththerequirementsofISO/IEC9646-4[8].Inparticular,theseconcerntherealizationofanExecutableTestSuite(ExTS)basedoneachATS.ThetestrealizershallprovideastatementofconformanceoftheMOTtothisATSspecification.AnExTSwhichconformstothisATSspecificationshallcontaintestgroupsandtestcaseswhicharetechnicallyequivalenttothosecontainedintheATSinannexC.Allsequencesoftesteventscomprisinganabstracttestcaseshallbecapableofbeingrealizedintheexecutabletestcase.AnyfurthercheckingwhichthetestsystemmightbecapableofperformingisoutsidethescopeofthisATSspecificationandshallnotcontributetotheverdictassignmentforeachtestcase.TestlaboratoriesrunningconformancetestservicesusingthisATSshallcomplywithISO/IEC9646-5[9].Atestlaboratorywhichclaimstoconformtot
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