ISO 4342:1985

Numerical control of machines — NC processor input — Basic part program reference language

Defines a higher-level symbolic part-programming language which is processed by a digital computer to produce a NC machine program. Annex A gives rules for representing the RL on punched cards; annex B contains syntax description on the reference language; a list of recommended synonyms is given in annex C; annex D includes an alphabetical list of major words and locations.