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

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