5. An article of manufacture comprising software stored on a non-transitory storage medium, the software comprising: an application analysis mechanism that generates an application model of a composite application that includes a plurality of components written in a plurality of different programming languages, wherein the application model comprises: the plurality of components in the composite application separated into a plurality of categories according to programming language; and metadata that describes interaction between components in a first of the plurality of categories with components in a second of the plurality of categories; the application analysis mechanism analyzes the application model for conformance to a plurality of component interaction rules, each component interaction rule comprising at least one condition between components in different programming languages and at least one action to perform depending on whether the at least one condition is satisfied, and outputs results of analyzing the application model for conformance to the plurality of component interaction rules.
8. The article of manufacture of claim 5 wherein the at least one condition specifies two programming languages and an interaction between the two programming languages.