Preparing Drupal for Content Migration
Installing the Feeds Tamper module
Other import module considerations
Prepping your existing data for migration
Planning for the content type fields
Adding fields to the content type
Running the import with the tamper plugin
Testing the tamper plugin results
Packaging Content Types and Feeds Importers
Migrating your feature to another Drupal site
Migration Using the Migrate Module
Migrate module installation and configuration
Migrating Content from Earlier Drupal Versions