NF EN ISO 5459
Geometrical product specifications (GPS) - Geometrical tolerancing - Datums and datum systems
Dans la série des normes relatives au tolérancement géométrique, le présent document donne les règles concernant l''indication sur les dessins des références spécifiées et des systèmes de références spécifiés. Ces références sont utilisées, en application de la norme NF EN ISO 1101, pour les tolérances d''orientation, de position et de battement. Le présent document précise également la signification des concepts utilisés. Les pratiques utilisées en application de la version précédente de la norme, qui ne sont plus aujourd''hui reconnues, sont données en annexe D. La situation du présent document dans la matrice GPS est donnée en annexe G.
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