Directory structure

/
+- datamodel/
|  +- core/
|  |  +- chapter{n}.json
|  |
|  +- local/
|     +- {local_name}/        // each localization has its own dir (namespace == dir name)
|     |  +- chapter{n}.json
| 
+- schema/
|  +- chapter/
|     +- v{n}.json
|
+- validator/                  // validator tool root (with it's source files & configs)
+- schema-chapter.json         // unix-like symlink to actual (stable) version of chapter schema
+- ...                         // other repository files, documents, etc.