Repeatable. It corresponds to the revisions of the curriculum guideline. A revision information consists of a blank node, which has nine properties <code>schema:name</code>, <code>schema:datePublished</code>, <code>schema:citation</code>, <code>schema:url</code>, <code>rdfs:seeAlso</code>, <code>schema:isbn</code>, <code>nier:itemID</code>, <code>nier:callNumber</code>, and <code>nier:recordID</code>.
Using language tags, this property represents an original name as well as transcription and English name. Language codes are as follows:<dl><dt>@ja</dt><dd>Japanese name (Kanji)</dd><dt>@ja-Hira</dt><dd>Japanese name (Hiragana). Presented a transcription of the name in Hiragana.</dd><dt>@en</dt><dd>English name</dd></dl>