// Any is any merkledag Node

type Identity struct {
  Key SigningKey // link to a signing key

  Data struct {
    Name string // the "name" of the identity
  }
}

type Authorship struct {
  Author Identity

  Data struct {
    Date string // ISO timestamp in UTC?
  }
}

type Signature struct {
  Object Any        // link to the signed object
  Key    SigningKey // link to the signing key

  Data struct {
    Signature []byte // the signature bytes
  }
}

// generic type that terminates in a certain other leaf type
type Tree<LEAF_TYPE> struct {
  NAME Link<Tree | LEAF_TYPE>
  ...
}

type Commit struct {
  Parents   []Commit     // "parent0" ... "parentN"
  Author    Authorship   // link to an Authorship
  Committer Authorship   // link to an Authorship
  Object    Any          // what we version ("tree" in git)

  Data struct {
    Comment String // describes the commit
  }
}

type VersionRepository struct {
  Refs Tree<Commit> // hierarchy of {branches, tags, heads, remotes, ... }
  Logs Tree<File>   // reflogs, etc... (maybe should be other than files...)
}