The River of CPAN
This blog post describes a model that we found useful for talking about CPAN dependencies and reverse dependencies at the QA Hackathon. At the head of the river is Perl itself with the core modules. The river flows into the sea, which contains all distributions that aren’t used by any other distribution. Other distributions sit somewhere along the river, their position determined by their reverse dependencies. This post introduces the core concepts, but nothing more.
Footnote
The cpan-river-300 list can be extracted from the .psv.gz files found at thenceforward.net