# Format Specification


:information_source: **Notes:**  
- The current TileDB format version number is **7** (`uint32_t`).
- All data written by TileDB and referenced in this document is **little-endian**. 

## Table of Contents

* **Array**
   * [File hierarchy](./array_file_hierarchy.md)
   * [Array Schema](./array_schema.md)
   * [Fragment](./fragment.md)
   * [Array Metadata](./array_metadata.md)
   * [Tile](./tile.md)
   * [Generic Tile](./generic_tile.md)
* **Group**
   * [File hierarchy](./group_file_hierarchy.md)