- The Dictionary:
  - Every option tree must include a `commands.cnf` file in its `cfg` subdirectory.
    - This file is called the "Command Dictionary."
    - This file is read into memory when the option tree is added to the path.
  - NeXtMidas uses "reflection" to call primitives/intrinsics at runtime.
    - This allows option trees to be used while the SYS option tree remains completely independent of the other option trees.
    - NeXtMidas uses information in the command dictionary to figure out how to instantiate a primitive/intrinsic.

X-Midas Users Take Note:
The command dictionary in NeXtMidas is named `commands.cnf` while X-Midas uses `commands.cfg`. This allows an option tree to contain a mix of NeXtMidas and X-Midas commands. It is important to note that the internal structure of the command dictionaries differ between X-Midas and NeXtMidas.