swhid_core is an OCaml library to work with persistent identifiers used by Software Heritage, also known as swhid. This is the core library, for most use cases you should use the swhid library instead.
swhid_core can be installed with opam:
opam install swhid_core
If you don't have
opam, you can install it following the how to install opam guide.
If you can't or don't want to use
opam, consult the opam file for build instructions.