Resources for the Cross Domain Interoperability Framework (CDIF) have just been expanded to include a series of converters for metadata encoded in a range of domain standards. These converters are developed in Python, and provide transformations both to and from the relevant CDIF profiles. Each is accompanied by a set of example metadata. The conversions cover Croissant ML, Science on Schema.org (SOSO), DDI Codebook, the FAIR2 specification, DCAT, the NASA Common Metadata Repository (CMR) Unified Metadata Model – Collections, DDI-CDI, and RO Crate.
The mappings used in the converters are published in the Simple Standard for Sharing Ontological Mappings (SSSOM) format, for modification and reuse. The converters use a combination of SSSOM mapping and transforms implemented by the python code; the documentation for each converted explains the workflow.
These converters have been developed using Claude Code, in support of various CDIF implementation projects. They are offered as a way to help people understand how CDIF can be employed as an integration layer between the standards used by different domains and infrastructures, fulfilling its role as a FAIR “lingua franca”. While these are not necessarily production quality, they can serve as the basis for the development of tools in other projects, and as a useful way to explore CDIF in a practical fashion.
All the converters are available under open-source licensing: the coversion software under Apache 2.0, and the other resources under CC BY International. The set of converters will continue to grow over time.
The converters and associated resources are available at the following links:
Github: https://github.com/Cross-
CDIF Book: https://cross-domain-
Users are encouraged to file issues in the repository.
Any queries should be addressed to cdif-feedback@codata.org
Join CDIF Community List: https://bit.ly/Join-CDIF-