DIN EN ISO 12780-2:2011-07

In this document the specification operators for straightness of integral features are specified. Up to now no consensus on default conditions of filtering and stylus radii as well as association methods could be achieved in ISO/TC 213. This means that for specifying straightness the applied values for the specification operators have to be indicated unambiguously. If this is not done, the specification is inaccurate and a supplier may use any non-specified value to prove conformity.