I have an windows application developed, and I need to document its architecture. I made a 3-tier diagram according to Microsoft Practices and Patterns, but my chief wants a representation made from UML's perspective.
How do you represent a 3-tier diagram on UML?
PS: The three tiers are basically, a presentation layer, business layer and data access layer. Just in case.
You should use UML package diagrams. For a similar example please see this link. Specifically the "Multi-Layered Web Architecture" part.