When you define a tool information model in the Repository, you define classes of objects, types of relationships that can exist between objects, and various properties that are attached to these object classes and relationship types. The relationship types that you define in your tool information model are represented by instances of the RelationshipDef class.
Use the RelationshipDef Class to access the properties of a relationship definition (also referred to as a relationship type).
To insert a new relationship type into a tool information model, use the ReposTypeLib class.
| Interface | Description |
| IAnnotationalProps | Gets and sets annotational properties. |
| IClassDef | Manages class definitions. |
| IRepositoryDispatch | Provides enhanced dispatch support. |
| IRepositoryItem | Manages Repository objects and relationships. |
| IRepositoryObject | Retrieves Repository object identifiers. |
| IRepositoryObjectStorage | Creates and loads Repository objects. |
| IReposTypeInfo | Contains the collection of definition objects that are associated with an information model's Repository type library. |