Conventions Used in the Tables

The names of key variables are appended with two asterisks (**). Some data sets do not have a key.

Foreign key variable names are prepended with two carat characters (^^). Foreign key variable names reference, in brackets [ ], the name of the data set for which it is a foreign key.

Required fields are marked with an X between brackets [X]. Required fields are fields for which a non-nil and non-whitespace-only value must be supplied in any observation for that data set.

All data set names and column names are case sensitive. They must be specified exactly as shown.