This International Standard contains basic information and gives requirements for the geometrical tolerancing of workpieces. It represents the initial basis and defines the fundamentals for geometrical tolerancing. The illustrations in this International Standard are intended to illustrate how a specification can be fully indicated with visible annotation. NOTE 1 Other International Standards referenced in Clause 2 and in Tables 2 and 3 provide more detailed information on geometrical tolerancing. NOTE 2 This International Standard gives rules for explicit and direct indications of geometrical specifications. ISO 16792 gives an alternative for indirect indications by giving possibilities of attaching specifications to 3D CAD models, where elements of the specification may be available through a query function or other interrogation of information on the model instead of being indicated using visible annotation, without changing the geometrical specification.. Versión anterior - NOTE 2 As an alternative to this International Standard, ISO 16792 gives possibilities of attaching specifications to 3D CAD models, where elements of the specification may be available through a query function or other interrogation of information on the model instead of being indicated using visible annotation.