http://www.rfc-editor.org/rfc/rfc4735.txt
RFC 4735: Example Media Types for Use in Documentation, T. Taylor2006-10-01T23:00:00-00:00This document is registration for the 'example' media type and 'example' subtypes within the standards tree. The 'example/*' and '*/example' media types are defined for documentation purposes only. [STANDARDS-TRACK]