[1]
[CITE@en[draft-pics-services-00 - Rating Services and Rating Systems (and Their Machine Readable Descriptions)]] ([CODE[2007-01-27 23:38:24 +09:00]] 版) <http://tools.ietf.org/html/draft-pics-services-00>
([[名無しさん]])

[2]
[CITE@en[draft-pics-services-00 - Rating Services and Rating Systems (and Their Machine Readable Descriptions)]] ([CODE[2007-01-27 23:38:24 +09:00]] 版) <http://tools.ietf.org/html/draft-pics-services-00>
([[名無しさん]])

[3]
[CITE@en[draft-pics-labels-00 - Label Syntax and Communication Protocols]] ([CODE[2007-01-27 23:44:46 +09:00]] 版) <http://tools.ietf.org/html/draft-pics-labels-00>
([[名無しさん]])


[4]
[CITE[Re: Question about the PICS label in HTML5]] ([[Phil Archer <parcher@...>]] 著, [TIME[2008-04-17 08:37:30 +09:00]] 版) <http://permalink.gmane.org/gmane.org.w3c.whatwg.discuss/13746>

[5] [CITE[PICS Superseded by POWDER]]
( ([TIME[2009-11-25 19:43:28 +09:00]] 版))
<http://www.w3.org/2009/08/pics_superseded.html>

[6] [CITE[REC-PICS-labels-961031]]
( ([TIME[2000-09-09 01:13:50 +09:00]] 版))
<http://www.w3.org/TR/REC-PICS-labels-961031>