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UML for ODP system specifications ITU-T X.906 | ISO/IEC 19793 (A work-in-progress presentation) Antonio Vallecillo Universidad de Málaga Dept. Lenguajes.

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Presentation on theme: "UML for ODP system specifications ITU-T X.906 | ISO/IEC 19793 (A work-in-progress presentation) Antonio Vallecillo Universidad de Málaga Dept. Lenguajes."— Presentation transcript:

1 UML for ODP system specifications ITU-T X.906 | ISO/IEC (A work-in-progress presentation) Antonio Vallecillo Universidad de Málaga Dept. Lenguajes y Ciencias de la Computación

2 April Agenda 1. ODP system specifications 2. Use of UML for ODP system specifications 3. ODP system specifications and the MDA 4. Sources and progress so far 5. What is left, and what is next 6. Conclusions

3 April Important Disclaimer –This presentation describes work in progress, that may (and will) change as the ISO/IEC Standard | ITU-T Rec. X.906 is developed. Acknowledgements –The work presented here has been developed by the ISO/IEC JTC1-SC7-WG19 Working group. We’d like to acknowledge the work by many ODP experts who have been involved in investigating and addressing the problems of the UML specification of ODP systems. Specially mention deserve Sandy Tyndale- Biscoe, Akira Tanaka and Bryan Wood.

4 April ODP System Specifications The Reference Model of ODP (ITU-T Rec X | ISO/IEC 10746) defines a framework for system specification, covering all aspects of open distributed systems: –“enterprise” context, functionality, distribution, infrastructure, technology It comprises –a structure for system specifications in terms of viewpoints –a language (concepts and rules) for expressing each viewpoint specification –a set of object-oriented foundation modeling concepts common to all viewpoint languages

5 April ODP Viewpoints Different abstractions of the same system –each abstraction focuses on different concerns –each abstraction achieved using a set of viewpoint concepts and rules A mechanism for dealing with the complexity of distributed systems An ODP specification includes a set of viewpoint specifications –Each viewpoint specification is expressed in terms of the viewpoint concepts and rules (the VP language) –Includes correspondences with other ODP VP specs

6 April ODP Viewpoints—different concernsSystem Enterprise Computational Information Technology Engineering

7 April The enterprise specification Specifies the roles played by the system in its organizational environment An object model of, for example, part of some social/commercial organization in terms of: –Enterprise objects –Communities (of enterprise objects) –Behaviour Roles (fulfilled by enterprise objects in a community) Processes (leading to Objectives) –Policies –Accountability –…

8 April The information specification Specifies system behavior to fulfill its enterprise roles, abstracted from implementation An object model of the system describing the semantics of information and of information processing in the system, in terms of: –Information objects –Invariant schema: predicates on information objects that must always be true –Static schema: state of information objects at some location in time –Dynamic schema: allowable state changes of information objects

9 April The computational specification Specifies computational structure of the system in terms of its functionality (distribution and technology independent) An object model of the system describing its functionality in terms of: –Computational objects –Interfaces (of computational objects): functions supported –Invocations (by computational objects): functions invoked –Computational bindings –Environment contracts

10 April The engineering specification Specifies the mechanisms and services that provide the distribution transparencies and QoS constraints required by the system, independent of platform and technology An object model of the system describing the infrastructure supporting the computational structure –Basic engineering objects –(infrastructure) engineering objects –Clusters, capsules, nodes –Channels –Functions

11 April The technology specification Specifies the H/W and S/W pieces from which the system is built An object model of the system –defining the configuration of technology objects that comprise the ODP system, and the interfaces between them –identifying conformance points

12 April An ODP system specification - Object configuration - Interactions between objects at interfaces Computational Enterprise - business aspects - What for? Why? Who? When? - information - changes to information - constraints Information - Hardware and software components implementing the system Technology Engineering - Mechanisms and services for distribution trans- parencies and QoS constraints. - and correspondences between specifications

13 April Correspondences between ODP VPs Enterprise Technology Engineering Computational Information

14 April Use of UML* for ODP system specs ITU-T X.906 | ISO/IEC A standard defining: –a set of UML Profiles for expressing a system specification in terms of viewpoint specifications –possible relationships between the resultant ODP viewpoint specifications and how they are represented –the structure of a system specification expressed as a set of UML models using ODP viewpoint profiles A standard that enables the use of MDA tools in developing and maintaining ODP system specifications *currently Version 1.4.1, but moving to 2.0

15 April Use of UML* for ODP system specs ITU-T X.906 | ISO/IEC Why? –RM-ODP is notation- and methodology- independent –Which is an advantage (a-priori)... –...but hampers its use and adoption Target audiences of ISO/IEC –UML Modelers that need to structure (somehow) their LARGE system specifications –ODP Modelers that need some (graphical) notation for expressing their ODP specifications –Tool vendors

16 April UML Profiles for ODP Viewpoint Languages

17 April ODP Specifications and the MDA

18 April ODP System specification structure >

19 April Enterprise metamodel (excerpt)

20 April UML Profile – Enterprise lang. (excerpt) ConceptStereotypeUML Metaclass ODP System«EV_ODPSystem» Class Field of Application«EV_FieldOfApplication» Comment attached to Package Community«EV_Community» Subsystem Enterprise Object«EV_EnterpriseObject» Class Enterprise Object fulfilling Role«EV_FulfilsRole» Association Community Object«EV_CommunityObject» Class Objective«EV_Objective» Class Role«EV_Role» Class, StateMachine (in role model), Partition (in process model) Action«EV_Action» State Interaction«EV_Interaction» Class, StateMachine, ActivityGraph Process«EV_Process» Class, A ctivityGraph Step«EV_Step» ActionState Artefact«EV_Artefact» ObjectFlowState (in process model), Signal (in role model)

21 April UML Profile – Enterprise lang. (icons) «EV_EnterpriseObject» «EV_ODPSystem» «EV_Role» «EV_Interaction» «EV_Artefact» «EV_CommunityObject» «EV_Community» «EV_Objective» «EV_Process» «EV_Step»

22 April Information Language metamodel

23 April UML Profile – Information Language

24 April UML Profile – Information lang. (icons) «Information_Spec» «IV_InformationObject» «IV_InformationObjectType» «IV_ActionType» «IV_InvariantSchema» « IV_StaticSchema» « IV_DynamicSchema»

25 April Computational Language metamodel

26 April UML Profile – Computational Language

27 April Engineering Language metamodel (1)

28 April Engineering Language metamodel (2)

29 April Technology Language metamodel

30 April UML mappings – Technology language Technology Language ConceptsCorresponding UML elements Technology objectDeployment diagram including instances of components Implementable standarda)Stereotyped Notes attached to deployment diagram and/or instance of components or b)UML tagged values or named property list ImplementationA process of building a testable UML system according to a UML model or models IXITStereotyped Notes

31 April UML 4 ODP – (Some) Sources Japanese Association of Healthcare Information System Industry (JAHSI) - Hospital Information Reference Enterprise Model project European research projects: –e.g. COMBINE - investigating the organisation and process for component-based system development Industrial Practice OMG –UML profile for Enterprise Distributed Object Computing (EDOC) A worked example for the standard

32 April An example: the Templeman Library The example is about the computerized system that supports the operations of a University Library, in particular those related to the borrowing process of the Library items. The system should keep track of the items of the University Library, its borrowers, and their outstanding loans. The library system will be used by the library staff (librarian and assistants) to help them record loans, returns, etc.

33 April UML specification of the ODP system

34 April Enterprise spec – Global

35 April Enterprise spec – Library Community

36 April Enterprise spec – enterprise objects

37 April Enterprise spec – Role fulfilment

38 April Enterprise spec – Processes

39 April Enterprise spec – Activity graph

40 April Enterprise spec – Artefact roles of Loan

41 April Enterprise spec – Interactions

42 April Enterprise spec – state diagram for Borrower role

43 April Enterprise spec – Policies

44 April Enterprise spec – Delegation

45 April Enterprise spec – Interactions between comunities context Templeman Library System (E Spec)::Library::Behaviour::Roles::Librarian inv: self.roleFiller <> Templeman Library System (E Spec)::Personnel::Behaviour::Roles::Dean.roleFiller

46 April Information specification

47 April Information spec – Object types

48 April Information spec – Action types

49 April Information spec – invariant schemata context Library inv undergradLimits: (undergradMaxLoans = 8) and (undergradBookLoanPeriod = 28) and (undergradPeriodicalLoanPeriod = 0) context Library inv uniqueIdentifiers: self.items->forAll( itm1,itm2 | <> and self.users->forAll( usr1,usr2 | <> context Library inv oneLibrarianAndOneClockWhileOpen: self.isOpen implies (self.Librarian->size() = 1) and (self.Calendar->size() = 1) context Library inv consistentNumberOfLoans: self.users.borrowedItems->sum() =>size() context Loan inv wellFormedLoans: issueDate <= dueDate

50 April Information spec – Static schema

51 April Information spec – Dynamic schema

52 April Computational spec – (diff. example)

53 April Progress and Targets Start of ProjectMay 2003 SC7 WDMay 2004SC7 meeting 1st CDDec 2004 FCDMay 2005 SC7 meeting FDISDec 2005 ISMay 2006 SC7 meeting Current WD is available as ISO-stds/

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