Reference

All functions
derive_epoch()	Assign EPOCH to any domain from Subject Elements
derive_etcd()	Assign ETCD to exposure records from the trial design
derive_se()	Derive the Subject Elements (SE) domain
derive_sv()	Derive the Subject Visits (SV) domain
make_supp()	Build a SUPPQUAL dataset from a domain and a spec
print(<sdtmgap_domain>)	Print a derived SDTM domain
sdtmgap_example()	Bundled example SDTM inputs