PICS rating label

Applicable protocol:: Mail (http://www.rfc-editor.org/rfc/rfc2822.txt)
Status:: standard
Author/Change controller:: W3C (mailto:web-human@w3.org)
World Wide Web Consortium.
Specification document(s):: http://www.w3.org/TR/REC-PICS-labels
Related information:: Ratings label to control selection (filtering) of messages according to the PICS protocol. Specified for general use with RFC822 message format, with HTTP-specific extensions