[1] - Module Definition Conventions (2002-12-12 23:58:38 +09:00 版) http://www.w3.org/TR/2002/WD-xhtml2-20021211/abstraction.html#dt_LinkTypes

Refers to a P3P Policy Reference File.

[2] The Platform for Privacy Preferences 1.0 (P3P1.0) Specification ( (2002-04-16 22:03:48 +09:00 版)) http://www.w3.org/TR/P3P/#syntax_link