[1] [CITE@en-us[choose - MDC]]
([TIME[2010-01-21 13:29:14 +09:00]] 版)
<https://developer.mozilla.org/en/XPath/Functions/choose>

[2] [CITE@en[XProc 2.0: An XML Pipeline Language]]
([TIME[2016-07-21 14:35:49 +09:00]])
<https://www.w3.org/TR/2016/NOTE-xproc20-20160721/#p.choose>