[1] [CITE[[[JSON Feed]] - JSON Feed Version 1]]
([TIME[2020-08-11T17:02:07.000Z]], [TIME[2020-10-07T02:39:56.452Z]])
<https://jsonfeed.org/version/1#extensions>

[2] [CITE[[[JSON Feed]] - JSON Feed Version 1.1]]
([TIME[2020-08-11T17:02:07.000Z]], [TIME[2020-10-07T03:11:52.847Z]])
<https://jsonfeed.org/version/1.1#extensions>