06.07.2000 slide 1 wolfram höpken rmsig reference model special interest group second rmsig...

06.07.2000 Slide 1Wolfram Höpken RMSIGRMSIGReference Model Special Interest Group

Second RMSIG Workshop

Methodology and Process

Wolfram Höpken


Workshop Objective

• first workshop– present and discuss basic methodology and process of

the RMSIG => white paper, elaborate prototype

• second workshop– discuss and agree upon methodology and process

• discuss white paper• evaluate prototype

• third and forth workshop– elaborate reference model

• fifth workshop:– agree upon first release of reference model


Agenda

• white paper of the RMSIG

• UML – Unified Modeling Language

• reference model prototype

• domain analysis – questionnaire

• Tourtags.org

• process of the RMSIG and next activities

• conclusion


Agenda





• Tourtags.org


• conclusion


Motivation

• drawbacks of current standardization initiatives– lack of flexibility and extendibility

• fix standards are hard to maintain

• no possibility for suppliers to differentiate their offer

– lack of expressiveness• description languages (e.g. XML) can not express all

information, necessary for interoperability

• lack of semantic information (e.g. relationships), process information, constraints,...


Methodology

• framework for modeling electronic tourism markets– uniform language with standardized building

blocks as vocabulary for describing electronic tourism markets

– conceptual, abstract modeling of tourism markets

– modeling based on the Unified Modeling Language (UML)


Modeling Levels

UML model

XML model Distributed object model


XML Perspective

XMI documents

XML DTDs

UML DTDs

Meta level

XML documentsData level

UML model


Distributed Object Perspective

UML model (concept) UML model (BOI)

XMI documents

XML DTDs

XML documents

Meta level

Data level BOs

IDL descriptions

XMI documents


Modeling Language

• tourism specific modeling language based on the UML– extends the UML by domain specific concepts

and mechanisms• composition mechanism• market interface descriptions

– provides building blocks as specific modeling elements

– enables the flexible description of specific models


Modeling Language (2)

UMLUML

Domain modelDomain model

Common meta level

concrete level


Modeling Language (2)

UMLUML

Domain modelDomain model

Common meta level

concrete level

Tourism modeling languageTourism modeling language Domain specific meta level


Building Blocks

• building blocks as specific modeling elements

• building blocks are provided on different levels of granularity– elementary building blocks (date, location,...)– tourism services (flight, hotel,...)– process building blocks (searching, booking,...)


Building Blocks

Process layer

Entity layer

Base layer

Name

Category

Room

Hotel Time

Route

Class

Flight Name

Address

Age

Customer

Criteria

Customer

ResultList

Searching Service

Customer

Date

Booking

StartLocation

EndLocation

RouteDate

Time

FacilitiesLocation

Address

Name


Building Concrete Models

• concrete models with specific entities are described or modelled by the UML-based tourism modeling language

• the provided building blocks can be used as basic modeling elements– composition: describe a specific entity as a

composition of building blocks– inheritance: describe a specific entity as a

refinement of a building block


Specific model

Reference model

Building Concrete Models (2)

Name

Category

Room

Hotel

CureServices

Name

Category

Room

CureHotel

derive

Category

Room

Time

MoonFlight

compose

MealPlan

Time

Route

Class

compose

XYFlight

Time

Class

Room

Name

Route

Category

CureServices

MealPlan


Interoperability

Supplier Customer

Reference model

2

lookup3

MealPlan

Time

Route

Class

XYFlight

MealPlan

Time Route

Class

1MealPlan

Time Route

Class

5 MealPlan

Time Route

Class

4

MealPlan

Time

Route

Class

XYFlight


Advantages

• flexibility and adaptability for suppliers• flexibility for change• low entrance barriers to electronic markets for

suppliers (SMEs)• easy access of customers to a wide range of

services• separation of semantic aspects and technical

aspects• interoperability is supported on all possible

communication levels


Agenda





• Tourtags.org


• conclusion


UML – Unified Modeling Language

• graphical language for describing and visualizing models of systems

• UML 1.3 adopted as standard by the OMG• enables the modeling of

– static structure of a system• entities, their internal structure• relationships between entities

– behavior of a system• interactions between entities (scenarios)• state sequences, activity sequences


UML Elements

• class diagram– classes

• name, attributes, operations

– relationships• association

• aggregation

• generalization


Class Diagram


Sequence Diagram


Agenda





• Tourtags.org


• conclusion


Reference Model Prototype

• objective: demonstrate and evaluate methodology of the reference model

• prototype focusses on– metalevel (tourism modeling language)

• tourism services• market processes and components

– building blocks• tourism services accommodation and hotel• search process

• reference model documentation– schematic model description

(packages, diagrams, classes, attributes, associations)


Reference Model Architecture

Building blocks

Metaclasses

Process layer

Entity layer

Base layer

Information processes

Booking processes

Commonentities

Servicecomponent

s

Elementarytourism services

Composition services

Base classes

Data maintenanc

e

Session manageme

nt

Lookup service

Common types

Common entities

Tourism services

Roles and

views

Processes


Reference model metalevel

• purpose– extends the UML (UML meta model)– adds tourism specific modeling elements– builds a tourism specific modeling language

• metaclasses vs. building blocks– metaclasses are part of the modeling language– building blocks are common components for concrete

models (instances of metaclasses)

MetaclassesCommon

typesCommon entities

Tourism

services

Roles and

views

Processes


Reference model metalevel

• common types: tourism specific types(e.g. room type, bed type, ...)

• common entities: metaclasses, which are used in different packages of the metamodel

• tourism services: metaclasses, providing concepts for constructing tourism services

• roles and views: metaclasses, providing concepts for views on entities and participant roles

• processes: metaclasses for describing market processes and interfaces

MetaclassesCommon

typesCommon entities

Tourism

services

Roles and

views

Processes


Building Blocks

– common modeling components for reuse

– support the construction of concrete models on different levels of granularity

Building blocks

Process layer

Entity layer

Base layer


Booking processes

Commonentities

Servicecomponent

s

Elementary

tourism services


Base classes

Data maintenanc

e

Session manageme

nt

Lookup service


Tourism Services

Building blocks

Metaclasses

Process layer

Entity layer

Base layer


Booking processes

Commonentities

Servicecomponent

s

Elementary

tourism services


Base classes

Data maintenanc

e

Session manageme

nt

Lookup service

Common types

Common entities

Tourism

services

Roles and

views

Processes


Tourism Services

• mechanism for the flexible construction of tourism services (composition mechanism)– complex services as composition of elementary

services (e.g. package tour as composition of flight and hotel)

– elementary services as composition of service components (e.g. hotel as composition of room and meal plan)

– composition consists of• components (elementary components or compositions)

• attributes (selection criteria)

• constraints


Tourism Service Metaclasses


Example Tourism Service Hotel


Example Tourism Service Train


Tourism Service Accommodation


Tourism Service Hotel


Market Processes and Components

Building blocks

Metaclasses

Process layer

Entity layer

Base layer


Booking processes

Commonentities

Servicecomponent

s

Elementary

tourism services


Base classes

Data maintenanc

e

Session manageme

nt

Lookup service

Common types

Common entities

Tourism

services

Roles and

views

Processes


Market Processes and Components• market components provide a set

of services or processes

• interfaces of market components are described by the available processes and their input and output

• lookup service provides market interface descriptions to other market participants


Search Process


Search Process Building Blocks


Search Process


Interoperability

• tourism specific modeling language– metaclasses (concepts and mechanisms)

• composition mechanism• market processes and interfaces

– common types (e.g. room type, bed type,...)– common building blocks (room, meal plan, hotel,

accommodation, search process)

• specific models can be understood because the participants know– the used types and building blocks– the way they are put together to a market component

model


Agenda





• Tourtags.org


• conclusion


Process of the RMSIG

• domain analysis (questionnaire)

• specify tourism modeling language(reference model metalevel)third workshop

• specify common building blocksforth workshop

• commit reference modelfifth workshop


Milestones and Deliverables

07/2000 Initial methodological frameworkCommitted initial version of the methodological framework for harmonizing electronic tourism markets

10/2000 Initial specification of electronic tourism marketsCommitted initial specification of electronic tourism markets

12/2000 Committed methodology and specificationCommitted final version of the harmonization methodology and the specification of electronic tourism markets

02/2001 Reference model of an electronic tourism market –Version 1.0First committed version of the reference model


Next Activities

• third workshop– objective

• specify tourism modeling language• evaluate metalevel by prototype

– date: end of August

• next activities– domain analysis (questionnaire)– identify and specify modeling language

elements (metaclasses)– extend prototype


Agenda





• Tourtags.org


• conclusion

06.07.2000 slide 1 wolfram höpken rmsig reference model special interest group second rmsig...

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