Can somebody please explain what concepts should be used for type_concept_id ?
Particularly I’m wondering in type_concept_id for cohort_definition and attribute_definition. I was looking through OMOP CDM specification and didn’t find detailed explanation for these fields.
Is the type_concept_id supposed to indicate what the cohort is? Cohort of persons, cohort of providers, cohort of care-site-id?
@frank is this for the cohort table in the cdm schema or results schema?
I’ve found interesting and useful vignete for Creating covariates using cohort attributes
where Martijn Schuemie explained actual goal of those tables with excellent example. (Thank you, @schuemie 
)