The slides were presented at the re3data COREF / CoreTrustSeal Workshop on Data Quality Management at Repositories that took place on October 5, 2022, 12:00-15:30 UTC. The workshop featured perspectives on data quality assurance from research data repositories, the certification organization CoreTrustSeal, and the registry of research data repositories re3data. Presentations showcased measures research data repositories undertake to ensure data quality, with the objective to share experiences, raise awareness and make the various activities repositories perform to assure, assess, and improve data quality visible. These slides present results of a survey on research data quality assurance at repositories conducted in 2021 as part of the re3data COREF project, and introduce a Framework of Quality Assurance for Data Publications at Research Data Repositories.