More and more people are choosing to move from Drupal 6 to Drupal 7 via a data migration approach rather than a straight upgrade. One reason is that the standard upgrade path has proven to be more painful than with previous major version upgrades. Another is that an upgrade is an opportunity for significantly reorganizing your content, and migration allows you to map your content in arbitrary ways to the target site.

We will discuss how to use the migrate_d2d module to migrate between Drupal installations, and consider it as a proof-of-concept for a proposal to build a migration approach into Drupal core.