Handy and Minimalistic Common Data Model Characterization // Extracts covariates from Observational Medical Outcomes Partnership (OMOP) Common Data Model (CDM) domains using an R-only pipeline. Supports configurable temporal windows, domain-specific covariates for drug exposure, drug era (including Anatomical Therapeutic Chemical (ATC) groupings), condition occurrence, condition era, concept sets and cohorts. Methods are based on the Observational Health Data Sciences and Informatics (OHDSI) framework described in Hripcsak et al. (2015) doi:10.1038/sdata.2015.35 and "The Book of OHDSI" OHDSI (2019, ISBN:978-1-7923-0589-8).