Access to Memory (AtoM)

AtoM 1.3 was our last release before the 2.x fork (db version 92). As we are maintaining the 1.x branch, our upgrade task (see lib/task/migrate, specially arUpgradeSqlTask.class.php) should be able to pick the corresponding upgrades for each user. Three user cases:

• 1.x users upgrading to 1.x: db upgrades targetting only 2.x will be ignored
• 2.x users upgrading to 2.x: any upgrade available is applied, we are not planning to introduce specific 1.x upgrades.
• 1.x users upgrading to 2.x: before the new upgrades are applied, we should go back and apply these 2.x upgrades that were ignored.

That means that 2.x-only upgrades may be applied against different db schemas.

                   ___93__94______96__97________...  1.x
                  /   ··  ··      ··  ··
                 /    ··  ··      ··  ··
90 - 91 - 92 - FORK   ··  ··      ··  ··
          |      \    ··  ··      ··  ··
          |       \___93__94__95__96__97__98__99...  2.x
          |

     [Release 1.3]