The HPSAMPLE Procedure

For classification variables, a level is an observed value that is distinct after formatting, removal of beginning and ending white space, and capitalization. For example, the values MyLevel and MYLEVEL are treated as a single level in the data set. Class variables can be numeric, and the same levelization rules apply. For example, 3.000002 and 3.0000001 are treated as the same level if they are formatted using BEST3.