Inheritance of properties

Properties are either inheritable or not--inheritance occurs within the result tree

Inheritable properties may not have any effect on a particular formatting object on which they are set but their values may affect descendant objects

Properties have some initial (default) value

Therefore, there is always a value defined for every property on every formatting object (either inherited, defaulted, or assigned), though not every property will be relevant to every formatting object

The description of each FO says which properties are relevant to it and how