This page summarizes all the main concepts about documents, access to documents and document storage.
The Nuxeo Platform repository stores documents, either using VCS or BDS implementation, and binaries, using the binary store. This persistence layer is configurable.
The Nuxeo Repository includes a configurable versioning system. Even the version storage service is pluggable so you can define your own storage for versions.
Read our HOWTOs about document types and document properties customization.