[1] Permissions and Obligations Expression Working Group (2016-07-20 20:09:25 +09:00) <https://www.w3.org/2016/poe/wiki/Main_Page>

[2] Permissions & Obligations Expression Working Group Charter (2016-02-27 03:29:58 +09:00) <https://www.w3.org/2016/poe/charter>

[3] ODRL Information Model (2017-09-23 00:41:59 +09:00) <https://www.w3.org/TR/2017/CR-odrl-model-20170926/>

[4] ODRL Vocabulary & Expression (2017-09-23 15:52:12 +09:00) <https://www.w3.org/TR/2017/CR-odrl-vocab-20170926/>

[5] ODRL Information Model 2.2 (2017-12-23 14:06:29 +09:00) <https://www.w3.org/TR/2018/PR-odrl-model-20180104/>

[6] ODRL Vocabulary & Expression 2.2 (2017-12-23 14:08:50 +09:00) <https://www.w3.org/TR/2018/PR-odrl-vocab-20180104/>

[7] ODRL Information Model 2.2 (2018-02-10 17:05:38 +09:00) <https://www.w3.org/TR/2018/REC-odrl-model-20180215/>

[8] ODRL Information Model 2.2 (2018-03-20 18:10:29 +09:00) <https://w3c.github.io/poe/model/>

[9] ODRL Vocabulary & Expression 2.2 (2018-02-10 17:08:29 +09:00) <https://www.w3.org/TR/2018/REC-odrl-vocab-20180215/>

[10] ODRL Vocabulary & Expression 2.2 (2018-03-20 18:10:29 +09:00) <https://w3c.github.io/poe/vocab/>

[11] ODRL: A Path Well Travelled | W3C Blog (2018-03-25 23:01:56 +09:00) <https://www.w3.org/blog/2018/02/odrl-a-path-well-travelled/>