An Annotation Package is a specialized form of Package that the system automatically creates when you open a diagram and add diagrammatic elements - non-model elements that have no purpose outside a diagram. Such elements include:
- Diagram Links
- Image elements
- Boundary elements
- Navigation Cells
One Annotation Package is created for each parent Package, so if the Package has several diagrams all the diagrammatic elements are held in the one Annotation Package.
The Annotation Package does not have any properties (including not having a name), and is simply a container for the diagrammatic elements, allowing them to be listed in the Browser window and - if necessary - re-used in multiple diagrams. This also protects the elements from being deleted if any diagram that contains them is deleted. Note that if you delete all diagrams that contain the diagrammatic elements, the Annotation Package and its contents persists.
The Annotation Package is represented in the Browser window by three blue dots followed by brackets.