This part of ISO 14405 establishes the default specification operator for linear size and defines a number of special specification operators for linear size for feature of size types “cylinder” and “two parallel opposite planes”. It also defines the specification modifiers and the drawing indications for these linear sizes.
DS/EN ISO 14405-1:2011 history
2011DS/EN ISO 14405-1:2011 Geometrical product specifications (GPS) - Dimensional tolerancing - Part 1: Linear sizes