NOF Metamodel

Here you see the NOF Metamodel.

It displays the three main entities in the Metamodel

• ObjectSubClasses
  • These hold the properties of the data model.
  • They can be reused inside the model (as you see ObjectSubClass1 appears two times)
• SubClassesBags
  • The purpose of SubClassesBags is to bundle ObjectSubClasses together.
  • Object instances are always created from a SubClassesBag. When an instance is created, it will contain the properties of all the ObjectSubClasses in the Bag.
  • SubClassesBags cannot be reused. One SubClassesBag exists in exactly one ObjectClass.
  • SubClassesBags are aware of the sum of the properties of the ObjectSubclasses they contain.
• ObjectClasses
  • ObjectClasses contain one or more SubClassesBags.
  • An ObjectClass is aware of those properties common to every SubClassesBag it contains.