Theme
From PMDOWiki
A theme is a general classification of a type of object into a subset of objects based on that theme.
Usage
Themes are typically used to modify the spawn rates of spawnables. They are typically assigned their own separate weight in a spawn table, in order to modify the rate that each member of that theme will have of spawning.
The use of themes is most predominant in the generation of houses and shops. The most used themes in PMDO are item themes and mob themes.
