[1] [CITE[W3C Synchronized Multimedia Home page]]
( ([TIME[2012-03-30 15:56:54 +09:00]] 版))
<http://www.w3.org/AudioVideo/>

[2] [CITE@en-US[Synchronized Multimedia Activity Statement]]
( ([TIME[2012-04-05 02:41:58 +09:00]] 版))
<http://www.w3.org/AudioVideo/Activity.html>

[3] [CITE[SYMM Working Group Charter]]
( ([TIME[2009-12-23 03:23:11 +09:00]] 版))
<http://www.w3.org/AudioVideo/2004/symm-wg-charter20060601.html>

[4] [CITE[www-smil@w3.org Mail Archives]]
( ([TIME[2014-12-01 11:27:31 +09:00]] 版))
<http://lists.w3.org/Archives/Public/www-smil/>

[FIG(quote)[
[FIGCAPTION[
[5] [CITE@en[Synchronized Multimedia Activity Statement]]
([TIME[2012-04-05 02:41:58 +09:00]])
<https://www.w3.org/AudioVideo/Activity.html>
]FIGCAPTION]

> The SYMM (Synchronized Multimedia) Working Group and SYMM activity are now closed since 01 April 2012.

]FIG]