Foundation Classes for Physical Properties
The diagram displays the common foundation classes necessary for the description of physical properties of a part (e.g. material, mass and size). Most of these classes either define a type of their value (e.g. TemperatureInformation.temperatureType) or a reference system (e.g. Color.referenceSystem). In these cases attributes of these types normally have the multiplicity of [0..*] in order to define different values for different types (e.g. environment temperature, storage temperature, operating temperature) or to define the same value in different references systems (e.g. the same color in RAL, RGB or a company specific value).