[1] [CITE@en[XML Signature Syntax and Processing Version 1.1]]
( ([TIME[2013-04-16 23:47:22 +09:00]] 版))
<http://www.w3.org/TR/2013/REC-xmldsig-core1-20130411/#function-here>

[2] [CITE@en[XML Signature Syntax and Processing Version 2.0]] ([TIME[2013-02-05 03:22:09 +09:00]] 版) <http://www.w3.org/2008/xmlsec/Drafts/xmldsig-core-20/#sec-XPath>