A very long list of explanations of the types of the io control lists, with each rule having its own serial number.
https://files.mastodon.social/media_attachments/files/113/919/816/793/592/229/original/962ea824f09c6df2.png
Incidentally, I am very comfortable usually with reading language specifications, but I got hold of a copy of the FORTRAN 2008 spec and… this is one of the least friendly language specifications I've ever seen, when reading it to try to determine how a program should be written.
(Trivia: When the image on the right says something like "the value must be YES or NO" what they mean is "the value must be 'YES' or 'NO'.)
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