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The list of direct dependencies is not very interesting. Dependencies in drupal are mostly flat or the go one or two level deep... You can still spot redundant dependencies like for the module get-node where then dependency on contents could be left implicit by the virtue that imagefield depends indirectly on it.

After few inspiring talks in the drupal room at fosdem I decided to spend few hours to figure out the module dependency system in drupal.

Drupal has a highly modular design. The core is composed by a set of required modules (dependencies) and a set of optional modules (suggests). All contrib modules declare similar dependencies between each other. All dependencies are conjunctive, that is, in order to install a component all its dependencies must be satisfied.