Crosswalks of Research Software Metadata Schemas to CodeMeta

This dataset provides crosswalk mappings of 21 metadata schemas, vocabularies, and ontologies to the CodeMeta metadata schema. The mappings were created to analyze the research software metadata landscape and to support the development of a unified metadata schema for ConnOSS project.

The dataset includes mappings for 68 metadata properties derived from CodeMeta and schema.org. These properties cover a broad range of metadata concepts used to describe research software.

Mappings were established based on semantic equivalence between metadata concepts. The mapping process was conducted collaboratively, including iterative review and refinement to ensure consistency and completeness.

This work has been created as part of the activities of the Research Software Metadata Working Group in the NFDI Section Metadata, Terminologies and Provenance of the German National Research Data Infrastructure (NFDI). This work has received funding from the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) under grant No. 561044496, corresponding to the project Connected Open-Source Software (ConnOSS). Participants from the Research Software Metadata Working Group also acknolwedge DFG grants No. 441958017 corresponding to NFDI4Culture, No. 460234259 corresponding to NFDI4DataScience, No. 501865131 corresponding to NFDI4Energy, and No. 501875662 corresponding to NFDI4Immuno.

The crosswalks were used in the workshop "Towards a Community-based Extension for Research Software Metadata from the German research community " part of the 6th Conference for Research Software Engineering in Germany in Stuttgart on 05-March-2026.