<switch>

switch 要素 (SVG)

[1] Synchronized Multimedia Integration Language ( 版) http://www.w3.org/TR/1998/REC-smil-19980615/#switch

[4] Document Structure – SVG 1.1 (Second Edition) ( ( 版)) http://www.w3.org/TR/2011/REC-SVG11-20110816/struct.html#ConditionalProcessing

[2] systemLanguage