**Abstract**

The geometrical product specifications (GPSs) from new generation are composed of sev‐ eral standards issued by the ISO/TC 213. They are related to the way of denoting the re‐ quirements in the design engineering drawings, such as drawing indication, definition of tolerance and values of specifications, characteristic, parameters and definitions of actual features. They also include requirements relating to compare verification, measure instru‐ ment and calibrate size, distance, radius, angle, form and position of geometrical features, roughness profile, waviness profile, primary profile, surface imperfection and edges. A lot of new and mathematical terms, the size system, indications of dimensions other than linear sizes by using geometrical tolerances, uncertainty series, etc. are introduced in this chapter. The aim of this chapter is to explain the new requirements of new generation standards for geometrical product specifications related to positional deviation. The ad‐ vantages and disadvantages of the possibility to indicate the accurate requirements for lo‐ cation of surfaces and axes are discussed.

**Keywords:** ISO, standards, specification, verification, dimensioning, tolerancing, position
