The central Entity for a standalone page of content in Hypermedia.
A documentID has one Owner View, which is the latest version from the original author. A documentID points to a default branch, which is the main view of a document.
It also has different Variants Explicit Branches created by the Document Owner, Collaborators or any other Author.
In the future, the Author or Contributor will be able to Create a branch of the document. For more Primary Views, the Author will need to Duplicate the document.