The data frame schemes contains the schemes listed by at least one
'scheme + target population set' of the scheme_targetpop_sets object.
Data frame.
The REP (revisitplan) workflow. See https://github.com/inbo/n2khab-mne-designs/tree/revisitplan/100_design_common/010_revisitplan.
Other derivatives of defining REP objects:
domainpart_grts_n2khab,
mod_scheme_field_activity,
mod_scheme_targetfieldactivity,
mod_scheme_variableset_mainfieldactivity,
module_domain_schemes,
module_schemes,
module_targetpops,
sp_samplingframe_domain,
targetpops,
targetpops_strata