[1] [CITE[RIF Datatypes and Built-Ins 1.0 (Second Edition)]]
([TIME[2017-10-02 19:47:14 +09:00]])
<https://www.w3.org/TR/2013/REC-rif-dtb-20130205/>

[2] [CITE@en[Assistance requested to be able to register application/rif+xml media type]], [[Ralph Swick]], [TIME[2021-02-13 06:36:58 +09:00]], [TIME[2021-02-13T19:20:47.000Z]], [TIME[2021-03-18T12:13:10.469Z]] <https://lists.w3.org/Archives/Public/public-rdf-dev/2021Feb/0000.html>