...
GSBPM describes the approach from a high level, which may be important for some users of these statistics to know, so we should say something about this in the indicators ontology.
See https://statswiki.unece.org/display/GSBPM/II._The+Model#II._TheModel-_Toc375051196 and https://statswiki.unece.org/display/GSBPM/IV._Levels+1+and+2+of+the+Generic+Statistical+Business+Process+Model for the publicly available versions of what we walked through.