ISO/TS 10303-403:2005 specifies the application module for AP203 configuration controlled 3D design of mechanical parts and assemblies. The following are within the scope of ISO/TS 10303-403:2005: products that are mechanical parts and assemblies; product definition data and configuration control data pertaining to the design phase of a product's development; representation of an instance of a part in an assembly through its usage in a sub-assembly; six groups of shape representations of a part that includes advanced boundary representation, faceted boundary representation, manifold surfaces with topology, geometrically bounded surface and wireframe geometry, wireframe with topology, and constructive solid geometry in three-dimensions; geometric validation properties to allow the translation of geometric shape representations (advanced boundary representation and faceted boundary representation solids) to be checked for quality; geometric presentation of geometric shape representations by the application of colours, layers and groups; geometric and dimensional tolerances applied to geometric shape representations; textual annotation and notes applied to geometric shape representations.