...
History files from E3SM components should all have these global attributes. Examples are from EAM and should be adjusted as indicatedappropriate.
Anything labeled as “from coupler” can get its value from the infodata block in the coupler with a call to seq_infodata_GetData
title = (what is in this file) "EAM History file information" ;
...
:product = "model-output" ;
:realm = see table in https://github.com/WCRP-CMIP/CMIP6_CVs/blob/master/CMIP6_realm.json
:case = (CIME case id from coupler) ;
:username = (username from coupler) ;
...