Table “cu” contains externally derived data on character standards. Its content is based on data from the Common Locale Data Repository of the Unicode Consortium. The table’s source data are drawn from the “Characters” and “Main Exemplars” tables of the CLDR. These tables record expert judgments on which characters are commonly encounted in various language varieties.
Table “cp” contains PanLex editors’ judgments on characters deemed standard in various language varieties. Generally the only data in “cp” are data not also in “cu”.