Branches
module type S = sig ... endThe signature for branches. Irmin branches are similar to Git branches: they are used to associated user-defined names to head commits. Branches have a default value: the master branch.
String is an implementation of S where branches are strings. The master branch is "master". Valid branch names contain only alpha-numeric characters, -, _, ., and /.
module type STORE = sig ... endSTORE specifies the signature for branch stores.