Y and Z Comments

A card starting Y is copied to the printer output as soon as it is read by PREFIN, then ignored. It can be used to put comments, which the user wishes to appear on his output, into the Crystal Data. EXAMPLE:

Y RUN WITH LOW FUDGE FACTORS ON ALL TEMPERATURE FACTORS:

A card starting Z is ignored on input, and so can be used to intersperse comments in the Crystal Data. EXAMPLE:

Z Note this atomic position not as in literature

NOTE:

Most Crystal Data cards must appear in blocks, with all cards of the same letter together, but Y and Z cards may appear anywhere.