If one or more materials are declared in the material declaration, a name for the material is mandatory and a Identifier (MaterialID) of the material is optional. This material name is the name or other text identifier of the material within the product. Material name may describe the material and/or describe the use or location of the materials in the part. The MaterialID field in material can be used to identify a declared material based on specifications defined in a standard (e.g., ISO 1043, parts 1 through 4 for plastics).
When declaring a material in the declaration, the material class to which the material belongs should be reported in the “materialClassID” field. This is recommended by subclause 4.5.3(e) in the standard.