[1] RDFa Core 1.1 - Second Edition ( (2013-08-15 17:12:47 +09:00 版)) <http://www.w3.org/TR/rdfa-core/#A-inlist>

[2] XHTML+RDFa 1.1 - Second Edition ( (2013-08-15 17:11:45 +09:00 版)) <http://www.w3.org/TR/2013/REC-xhtml-rdfa-20130822/#a_xhtmlrdfa_schema>

[3] HTML+RDFa 1.1 ( (2013-08-20 15:49:04 +09:00 版)) <http://www.w3.org/TR/2013/REC-html-rdfa-20130822/#extensions-to-the-html5-syntax>