CEManTIKA FrameworkCEManTIKA FrameworkOverviewOverview

Vaninha Vieiravvs@cin.ufpe.br

Ana Carolina Salgadoacs@cin.ufpe.br

Patricia Tedescopcart@cin.ufpe.br

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O que é CEManTIKA

Framework para apoiar o Projeto de Sistemas Sensíveis ao Contexto

Composto por 4 elementos principais:Arquitetura Genérica (Gerenciamento de Contexto)

Metamodelo de Contexto

Perfis UML para apoiar a criação de modelos de contexto

Processo de software

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Descrição do Projeto

Elaborar um PROJETO de um CSS Guiado pelo Processo de Contexto

Deadline: 14/10/2008

Criar versão preliminar documentos sugeridos no Processo

Elaborar uma apresentação contendo: Apresentação do sistema e visão geral dos artefatos produzidos

Vantagens/desvantagens em usar os elementos CEManTIKA

Dificuldades encontradas

Sugestões de melhorias

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Context SpecificationContext Specification

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OMG Metamodel Architecture

Standard ComponentsModeling Notation: UMLMetadata Interchange: XMI

MIDDLEWARE

APPLICATION

User Data/ObjectLayer (M0)

Metadata/Model Layer(M1)

Metamodel Layer(M2)

Meta-metamodelLayer (M3)

<Person name=“Mary” age=“35”/>

Person: name, age

UML: Class, AttributeContext Metamodel: ContextualElement, Focus ContextualEntity, Rule

MOF: Class, Attribute, Operation, Association

Context Profile is based onUML 2.0

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Metamodel Profiles

UML ProfileExtensions of UML metamodel for specific areas

Three main elements Stereotypes, Tagged values, Well-formedness rules in OCL

Support CSS design Graphical representation using UML tools

Stereotypes enable the identification of the context-related concepts

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Example – Without Stereotypes

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Example – With Stereotypes

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UML Profile

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Context Specification

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Example – Identify Focus

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Example – Identify Focus

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Context Specification

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Identify Behavior Variations

Behavior without context

1) Users must provide keywords to search an expert;

2) Keywords should be mapped into ontology concepts

3) Subjects of expertise correspond to ontology concepts

4) Recommended experts :: match ontology concepts related to the keywords and the subjects of expertise;

5) Experts classified by their expertise degree

6) Show classified list of experts to the user

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Identify Behavior Variations

Behavior with context

1) Identify CEs associated to the User

2) Use User’s CEs to improve match keywords x ontology;

3) Identify CEs useful to rank Experts;

4) Use Expert’s CEs to improve experts selection and classification

5) Return Experts’ CEs in the generated list

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Context Specification

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Identify Contextual Entities and CEs(Preliminary Model - Without Stereotypes and CEs)

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Identify Contextual Entities and CEs(Context Model - With Stereotypes and new CEs)

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Context Specification

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Verify CEs Relevance

Perform surveys and interviews with potential usersHow they usually execute the tasks in real lifes?

Which CEs they use to make decisions or accomplish tasks?

Evaluate chosen CEs

Evaluate Relevance Weight for each CE which are more relevant, which are less relevant

according to users?

Context ManagementContext Management

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Main Elements in a CSS

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Architecture Context Management

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Specify Context Acquisition

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Design Acquisition Module

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Design Processing Module

JEOPS

Define Contextual Rules

Context UsageContext Usage

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CxG Profile (Contextual Graphs)

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Example: Context Behavior Model

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From Contextual Graphs to Inference Rules

Rule1:Conditions

not (Mission.occursIn==Person.livesIn)

Mission.whoPays=“CAPES”

Actions

CallBehavior(“Contact CAPES Official Agency”)

Rule2:Conditions

not (Mission.occursIn = Person.livesIn)

Mission.whoPays = “missionary”

Person.age < 26

Actions

CallBehavior(“Lookup Transport Types”)

CallBehavior(“Classify by Price”

CallBehavior(“Recommend Transport”)

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ICARE

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Exemplo de Atividade do Processo

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Referencias

http://www.cin.ufpe.br/~vvs/cemantika/docs Cap 4 – Arquitetura

Cap 5 – Metamodelo

Cap 6 – Processo

Cap 7 – Exemplo ICARE

UML Case Tool (sugerida) MagicDraw 15.5 Personal

Meu Email: vvs@cin.ufpe.br

Meu MSN: vaninha_vieira@hotmail.com