This is a framework based on the Migrate API to ease building migrations
from one Drupal site to another. It is only supported at this time on Drupal 7
(i.e., Drupal 7 is the only destination). Besides addressing contemporary needs
to migrate to Drupal 7, it is intended to help serve as a proof-of-concept for
incorporating the migration approach into core as an upgrade path
The core framework provided here is used by providing your own module, which
will register instances of the migrate_d2d classes (or derivations of them).
See migrate_d2d_example for one approach, where instances are registered when
the Drupal caches are cleared (note that registration updates previously-
registered classes with any argument changes).