Material Definitions
A material definition describes supplies or materials with unique characteristics. Definitions offer a specific defined material to be used in a production process in the creation of a final product.
A material definition can have multiple material classes associated with it, and inherits all of the properties defined for those material classes. You can also add properties directly to the material definition. A material definition can also stand alone with no associated material classes.
A material definition does not have to be a physical object, but can be characteristics of an object.
An example of a material definition is all of the components used to create the seat of a bicycle.