Getting Started with OHDSI
Common Data Model (CDM)
Convert Database to CDM (ETL)
Tool Specific Documentation
Discussion
http://forums.ohdsi.org/t/definition-of-visit-transfers-and-referrals-and-distinction-of-er-from-hospital-visits/1311
2106_11_01_ohdsi_cdm_and_vocab_wg_visit_type.docx