[1] [CITE@en-US[DOM Standard]]
( ([TIME[2014-06-23 14:49:32 +09:00]] 版))
<http://dom.spec.whatwg.org/#concept-traversal-whattoshow>

[2] [CITE@en-US[DOM Standard]]
( ([TIME[2014-06-23 14:49:32 +09:00]] 版))
<http://dom.spec.whatwg.org/#dom-nodeiterator-whattoshow>

[3] [CITE@en-US[DOM Standard]]
( ([TIME[2014-06-23 14:49:32 +09:00]] 版))
<http://dom.spec.whatwg.org/#dom-treewalker-whattoshow>