Open Definition 2.1 - Open Definition - Defining Open in Open Data, Open Content and Open Knowledge

Defining Open in Open Data, Open Content and Open Knowledge Version 2.1 The Open Definition makes precise the meaning of “open” with respect to knowledge, promoting a robust commons in which anyone may participate, and interoperability is maximized. Summary: Knowledge is open if anyone is free to access, use, modify, and share it — subject, at most, to measures that preserve provenance and opennes

[toyasyas]

@ogishima オープンデータの定義はOKFNが提唱している分については以下にあります。オープンデータといえるライセンスの要件が書かれています。そしてCreative Commonsの一部は要件を満たすことになります。