The MOAP Horizon 2020 database was created under the auspices of the Study “Monitoring the Open Access Policy of Horizon 2020” (SPECIFIC CONTRACT No RTD/2019/SC/021 implementing Framework contract No 2018/RTD/A2/OP/PP-07001-2018) For the purposes of the study, we created a relational database comprised of three schemata: 1. moap_org which contains mainly the data from OpenAIRE,3 2. moap_ec which contains mainly the data coming from the European Commission, and 3. moap_final which tables of indicators that lead to the analysis by different facets of interest.