[1] [CITE@en-US[Web DOM Core]]
( ([TIME[2010-12-31 15:37:01 +09:00]] 版))
<http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#dom-node-comparedocumentposition>

[2] [CITE@en-US[Document Object Model Core]]
( ([TIME[2004-04-08 02:57:17 +09:00]] 版))
<http://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-compareDocumentPosition>