This appendix summarizes the capabilities that your part editor must have if it is to support embedding. If you want your parts to be container parts, you must implement these features in your code.
Keep in mind that handling embedded parts usually means handling embedded frames; in most cases, your part interacts only with the frames of the parts embedded in it. Those embedded frames in turn interact with the parts displayed in them, and the embedded parts interact with their own embedded frames, and so on down through the embedding hierarchy.
This checklist is meant for quick reference only. The items in the list are discussed in greater detail elsewhere in this book.