Model, MOF, UML

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Model, MOF, UML
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Why Model(1)

• To describe something, we need to build a model.
• So, the goal of model is to describe something.

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Use what to build a model(2)

• We need some materials, or building blocks, or
  modeling elements
• Or Languages
• Or Tools

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Model(1)

• We want to describe data, so we build a model
• Use what to build this model?
• --UML
• So this model is called UML model, which means
  this is a model defined by UML.

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Model(2)

• Here UML is the language used to build the model.
  UML offers the building blocks, or modeling
  elements, to build the model
• The UML Specification whitepaper specifies the
  syntax and sementics of the UML language

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Metamodel(1)

• To describe models, we need to build metamodel
• Use what to build the metamodel
• --MOF
• So, this metamodel is called MOF metamodel,
  which means this is a metamodel defined by MOF

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Metamodel(2)

• This metamodel is also called UML metamodel.
  Perhaps comes from UML model, but a layer
  higher metamodel
• Here MOF is the language used to build the
  metamodel. MOF offers the building blocks, or
  modeling elements, to build the metamodel.
• MOF Specification whitepaper specifies the syntax
  and sementics of the MOF language

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Meta-metamodel(1)

• To describe metamodels, we need to build
  meta-metamodel
• Use what to build meta-metamodel?
• --still MOF
• This meta-metamodel is called MOF model.
  Perhaps should be MOF meta-metamodel, which
  means this is a meta-metamodel defined by MOF

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Meta-metamodel(2)

• Here MOF is the language used to build the
  meta-metamodel. MOF offers the building blocks,
  or modeling elements, to build the
  meta-metamodel.
• So, the MOF model is defined by MOF itself

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MOF UML

• UML is the language used to build model
• MOF is the language used to build metamodel
• UML offers a set of modeling elements, or
  building blocks, for people to build model
• MOF offers a set of modeling elements, or
  building blocks, for people to build metamodel
• The modeling elements, or building blocks are
• Classes, associations, packages,
• Thats why MOF and UML are so similar