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Re:FRAMES – A Framework for Representing Knowledge (1974) by lolive on Wednesday August 29, 2018 @03:28AM (#17866374)
Stanford universiry manages a tool called Protege (cf protege.stanford.edu). It is now fully RDF/OWL, I presume. But in the last decade, there was a dedicated version for FRAMES. (I Think this link is still valid: https://protege.stanford.edu/download/protege/3.4/installany...)
Re:FRAMES – A Framework for Representing Knowledge (1974) by rjsw on Wednesday August 29, 2018 @06:25AM (#17867115)
A stage inbetween Frames in Lisp and RDF/OWL was KIF [1].

[1] https://en.wikipedia.org/wiki/Knowledge_Interchange_Format