The DeepBlue Epigenomic Data Server provides a data access hub for large collections of epigenomic data. It organizes the data using controlled vocabularies and ontologies.
Albrecht, F., List, M., Bock, C., & Lengauer, T. (2016). DeepBlue epigenomic data server: programmatic data retrieval and analysis of epigenome region sets. Nucleic Acids Research.