What should a well-thought-out System Design Document (SDD) for a Contact Manager Program look like?

 

For a project, I must fully flesh out what the contact management software will have and how it will interact with its surrounding environment, including people and databases.

 

Could someone please provide an example of an SDD for a contact manager program — it need not be fully formed, but a rough outline of each required section (Intro, system architecture, file and database design, human-machine interface, detailed design, external interfaces, and system integrity controls). ?