Note: the structure of the PMIP database was originally defined in Newsletter 6.
There is one PMIP variable per file in the database.
To locate a variable/file in the database, you only need to understand the directory hierarchy of the database. The hierarchy is relative to the root of the database, and only depends on the run name and the stat type of variable you are interested in (please check the data files section for a detailed description of these parameters) :
pub/pmip/database/run/stat/modelid_run_variable_stat_vartype.nc
pub/database/run/stat/modelid_run_variable_stat_vartype.nc