The workbench is not the only plug-in that can create retargetable actions. Your plug-in can define its own retargetable action, so that views and editors within your plug-in can share the same menu actions. There are two ways to contribute retargetable actions from your plug-in:
This mechanism is useful for providing tight integration between editors and related views. For example, a content outline view can implement a handler for an action defined by its associated editor.
The readme tool example demonstrates both of these techniques.