This standard specifices the positional tolerancing.
The positional tolerancing of this standard is applicable to the location of a point, of a line nominally straight and of a surface nominally plane, e.g. the centre of a sphere, the axis of a hole or shaft and the median surface of a slot.
Note: Profile tolerancing is used when lines are not intended to be straight or surfaces are not intended to lie in a plane.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 18780.1-2002 Geometrical Product Specifications (GPS) — Geometrical Features — Part 1: General Terms and Definitions (ISO 14660-1, IDT)
ISO 1101 Geometrical Product Specifications (GPS) — Geometrical Tolerancing — Generalities, Definitions, Symbols, Indication on Drawings
3 Terms and Definitions
For the purpose of this standard, the term and definitions related to positional tolerancing and given in ISO 1101, and the term and definitions related to features and given in GB/T 18780.1 apply.
GB/T 13319-2003 The following standards are cited：
