Dyna Load Data
Dyna Load Data is a type of string used in various parts of the game including Locators (type 5) and mission scripts to load/unload sections of the world.
There's also unused functionality to toggle the visibility of World Spheres (the sky of a world).
||Enable World Sphere|
||Disable World Sphere|
Dyna Load Data is a series of file names (relative to the art folder) or World Sphere names followed by the aforementioned symbols to load/unload or enable/disable them.
Here are some examples.