# Package org.apache.ode.bpel.engine.migration

- Interface Summary
  Interface | Description
  --- | ---
  Migration | Implement and add to the list of migrations in MigrationHandler to allow database level migration.

- Class Summary
  Class | Description
  --- | ---
  CorrelationKeyMigration | Migrates the correlation key values to a scheme containing the OModel correlation set id to one using its name.
  CorrelationKeySetDataMigration | Changes the scheme of the correlation key value in the routes to use @2[...]
  CorrelationKeySetMigration | Migrates the database from using single correlations to multiple correlations support.
  CorrelatorsMigration | Migrates correlators used for routing from a selection scheme that's based on partnerLinkId+"."
  MigrationHandler | Checks database schema versions and migrates when necessary.
  OldCorrelationKey |
  OldSelector |
  OutstandingRequestsMigration | Migrates OutstandingRequestManager to IMAManager