DatAasee - A Metadata-Lake for Libraries

A library is a super repository of digital and physical data archives, which is organized by metadata. This metadata however, maybe distributed across various databases due to, for example, topical or typical grouping. To provide a unified view or overview of all resources, the metadata needs to be aggregated, normalized, and potentially interconnected. DatAasee is such a metadata aggregator based on a metadata-lake architecture: Metadata records are ingested from upstream (meta)data sources specified by protocol-format combinations, partially transformed, indexed, and connected to related metadata while their original formatting remains available. The resulting normalized metadata can then be queried by downstream services or clients. With this self-hostable open-source service, we aim to contribute an overarching metadata-layer that makes repositories and thus libraries more FAIR.