...
It is worthwhile reading the entire Memento specification to become acquainted with the Memento terminology (such as Original Resource, a Memento resource, Timemap, Timegate) and various interaction patterns, but the most relevant sections of the Memento specification to Fedora are section 4.1.1 and its relevant parent sections. Section 4.1.1 presents theHTTP/Memento interaction pattern implemented in Fedora. Also, familiarizing yourself with the Versioning section (Section 4 - https://fcrepo.github.io/fcrepo-specification/#resource-versioning) of the Fedora API Specification will be helpful to understanding concepts and terminology (LDPRv, LDPCv, LDPRm).
...