When configuring a Document Type to allow redactions, it is configured a best practice to create the redacted document as a new document of a different Document Type than the original document due to the increased security measures available by using separate Document Types for the original, unredacted document and the redacted document.
For example:
You can assign fewer Keyword Types to the redacted document than are assigned to the original document to prevent sensitive data from being made available to users via Keyword Values.
Additionally, you can specify separate security schemes for the original document and the redacted document; the original document (containing sensitive or private information) can be subject to stricter security controls than the redacted document, which can be made more widely available.