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10. It is recommended that producer-defined grouping or categorization variables begin with the name of the variable being grouped and end in GRy (e.g., variable ABCGRy is a character description of a grouping or categorization of the values from the ABC variable for analysis purposes). If any grouping of values from an SDTM variable is done, the name of the derived ADaM character grouping variable should begin with the SDTM variable name and end in GRy (GRyN for the numeric equivalent) where y is an integer [1-99, not zero-padded] representing a grouping scheme. For example, if a character analysis variable is created to contain values of Caucasian and Non-Caucasian from the SDTM RACE variable, then it should be named RACEGRy and its numeric equivalent should be named RACEGRyN (e.g., RACEGR1, RACEGR1N). As described in Table 3.1.5.1, Gy can be used as an abbreviated form of GRy when the use of GRy would create a variable name longer than 8 characters. Truncation of the original variable name may be necessary when appending suffix fragments GRy, GRyN, Gy, or GyN.