Reviewer: Menachem Dodge
Review result: Ready

I have reviewed this document as part of the Operational directorate's ongoing
effort to review all IETF documents being processed by the IESG. These comments
were written with the intent of improving the operational aspects of the IETF
drafts. Comments that are not addressed in last call may be included in AD
reviews during the IESG review. Document editors and WG chairs should treat
these comments just like any other last call comments.

Summary:
 This document supplements the CDNI Metadata Footprint Types defined in RFC 8006. 
 This document defines Footprint Types that can be used for Footprint objects as
 part of the Metadata interface (MI) defined in RFC 8006 or the
 Footprint & Capabilities Advertisement interface (FCI) defined in RFC
 8008. The document also updates RFC 9241 with relevant ALTO entity
 domain types. The defined Footprint Types are derived from
 requirements raised by Open Caching but are also applicable to CDNI
 use cases in general.