Which UML diagram to use to represent application architecture?

Question

I'm trying to map my whole application in a UML diagram and I'm wondering which UML what diagram type I should use; I'm not doing this in class level, but rather from a bird eye's perspective.

The elements I am trying to capture are:

1. single application object (patterns: singleton)(examples: CodeIgniter application) that composes
2. multiple module objects (patterns: singleton, facades)(examples: guestbook, addressbook) that compose
3. multiple low level stand alone objects (examples: mysql mapper, doctrine mapper) that compose
4. various 3rd and in-house libraries (examples: doctrine, solr, xml-parser)

What UML diagram is suited for this kind of overview presentation?

Answer 1

Sounds like you're looking for component diagrams.

From http://www.ibm.com/developerworks/rational/library/dec04/bell/

The component diagram's main purpose is to show the structural relationships between the components of a system.