After you customize your records and enable record delivery at the collection level, the system will process the field deletes and field additions you defined in Settings > MARC Records > Customize Records
Field deletes and additions are processed in the following order:
- Master records from WorldCat are retrieved for the titles.
- Your customization edits are processed in the following order so the system will not inadvertently delete the fields you are adding to your records:
- User-defined field deletes are processed.
- User-defined field additions.