Content Delivery Network Interconnection (CDNI) Metadata
CDN
cascaded CDN
cascading CDNs
content acquisition
content delegation
request delegation
acquisition protocol
delivery restriction
delivery policy
policy enforcement
delivery protocol
content expiration
geo-fencing
geofencing
geo fencing
geo-blocking
geoblocking
geo blocking
footprint
cache control
The Content Delivery Network Interconnection (CDNI) Metadata interface enables interconnected Content Delivery Networks (CDNs) to exchange content distribution metadata in order to enable content acquisition and delivery. The CDNI Metadata associated with a piece of content provides a downstream CDN with sufficient information for the downstream CDN to service content requests on behalf of an upstream CDN. This document describes both a base set of CDNI Metadata and the protocol for exchanging that metadata.