This part of ISO 10303 specifies the representation of product data quality especially focusing on three dimensional product shape data. It provides general specifications for the representation of quality criterion, quality measurement requirement, quality assessment specification and quality inspection result of product data. These specifications are provided so that this part of ISO 10303 can be extended to deal with non-shape data quality in the future. By focusing on three dimensional shape data, detailed specifications for the representation of shape data quality criterion together with corresponding measurement requirement, shape data quality assessment specification and detailed results of shape data quality inspection are provided. The following are within the scope of this part of ISO 10303: — representation of high level data elements for managing quality related data;— representation of general quality criteria for product data; — representation of general quality criteria for product data associated to the corresponding measurement requirements; — representation of general quality criteria for product data associated to the corresponding assessment specifications; — representation of quality inspection results of given product data; — representation of quality criteria for three dimensional product shape data coupled with measurement requirements for the evaluation of quality criteria and association with the pertinent assessment specifications: quality criteria can be used for the representation of requirement, declaration of, or assurance of, product shape data quality; the target shape data models are equivalent to those defined in ISO 10303-42;