[1]
[CITE[Cross-document messaging in Opera - Arve Bersvendsen]] <http://virtuelvis.com/archives/2005/12/cross-document-messaging>

[2]
[[Web Applications 1.0]] の、他の[[ドメイン]]の[[文書]]に[[メッセージ]]を送る機能。

[[Opera 8]] β にはありませんでしたが、 [[Opera 8.5]]
では実装されていました。

[3]
[CITE[The cross-document messaging APIs]] ([[Ian Hickson <ian@...>]] 著, [CODE[2007-08-09 00:51:36 +09:00]] 版) <http://permalink.gmane.org/gmane.org.w3c.whatwg.discuss/11634>

[4]
[CITE[Index of /specs/dom/messages]] ([CODE[2008-02-13 01:58:34 +09:00]] 版) <http://www.hixie.ch/specs/dom/messages/>

[23]
[CITE[Fixed a security problem with postMessage()]] ([[Ian Hickson <ian@...>]] 著, [CODE[2008-02-12 20:03:46 +09:00]] 版) <http://permalink.gmane.org/gmane.org.w3c.whatwg.discuss/13237>
([[名無しさん]])

[24]
[CITE[IE Team Feedback on HTML 5.0 Cross Document Messaging]] ([[Sunava Dutta <sunavad@...>]] 著, [CODE[2008-02-22 03:18:40 +09:00]] 版) <http://permalink.gmane.org/gmane.org.w3c.whatwg.discuss/13320>

[32]
[CITE[postMessage() issues]] ([[Ian Hickson <ian@...>]] 著, [CODE[2008-04-16 00:10:07 +09:00]] 版) <http://permalink.gmane.org/gmane.org.w3c.whatwg.discuss/13716>

[38]
[CITE[postMessage feedback]] ([[Ian Hickson <ian@...>]] 著, [CODE[2008-04-24 23:49:56 +09:00]] 版) <http://permalink.gmane.org/gmane.org.w3c.whatwg.discuss/13867>