This International Standard defines the elements of a set of post processor statements to be used in numerical control software. These statements are encoded on 2 000 class and 20 000 class CLDATA records or their equivalent.Each processor using one of the ISO numerical control programming languages shall be capable of producing post processor command type CLDATA records as defined in this International Standard.Each post processor shall be capable of using the post processor command type CLDATA records defined in this international Standard as input.This International Standard does not prescribethe mechanism by which the statements are processed;the medium on which the input language statements are recorded;the medium and format of output machine control data;the order of statements within a part program.