Metadata Completeness for Four FAIR Use Cases for all DataCite Repositories

FAIR Principle R1 recommends that "metadata are richly described with a plurality of accurate and relevant attributes", but the specifics of the metadata elements are left up to the community. Several years ago we proposed sets of DataCite metadata attributes that could be used to support several FAIR Use Cases and described how measuring completeness of those attributes could provide quantitative metrics that could be used to measure metadata FAIRness and track improvements through time. These ideas have been described and demonstrated in many contexts (see related identifiers). The current implementation includes four FAIR Use Cases: FAIR Text, FAIR Identifiers, FAIR Connections, and FAIR Contacts that contain 63 DataCite metadata elements. During May 2025 we calculated completeness for these use cases for 3066 DataCite repositories. This dataset is the result of that effort. It includes repository ids, number of records, completeness (% of records) for each use case and the total completeness. This version adds provider and consortium identifiers to the dataset to support repository grouping and completeness totals from May to compare to the totals during January 2026.