CPRDENTTYPE: Stata module to convert CPRD entity string data of any enttype to numeric

The cprdenttype package is intended for use with datasets produced by the cprdutil package to convert CPRD entity string data variables to numeric variables. cprdenttype inputs an integer number, assumed to be a CPRD enttype (or entity type) value, and a filename, assumed to be a Stata dataset produced by the cprd_entity module of cprdutil, with one observation for each enttype value known to CPRD. It outputs descriptive information about the entity type with the specified enttype value, and, optionally, two local macros, storing lists of CPRD lookups and descriptive labels for decoding the string data variables used by that enttype. cprdentcode is used in test and additional clinical datasets, produced by the cprd_test and cprd_additional modules of cprdutil, respectively. It inputs the lists specified by the local macros output by cprdenttype, and uses them to input the string entity data variables in the datasets, and to output a list of numeric variables with the correct formats, variable labels and/or value labels, assuming that the test or additional clinical observations have the enttype value originally specified by the user to cprdenttype. cprdentcode requires the SSC package chardef in order to work.