[1] W3C XML Schema Definition Language (XSD): Component Designators (2008-09-10 03:00:42 +09:00 版) http://www.w3.org/TR/2008/WD-xmlschema-ref-20080910/

[2] W3C XML Schema Definition Language (XSD): Component Designators (2010-01-20 00:21:31 +09:00 版) http://www.w3.org/TR/2010/CR-xmlschema-ref-20100119/