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Schemata for DANDI archive project

Project description

DANDI Schema

dandi-schema is a Python library for maintaining and managing DANDI metadata schemata.


pip install dandischema


Every Dandiset and associated asset has a metadata object that can be retrieved using the DANDI API. This library helps create and validate DANDI schema-compliant metadata for Dandisets and assets. It uses Pydantic to implement all the metadata classes. Schemas are generated on schema modifications and placed into this repository.

dandi-schema also generates JSON schema definitions and an associated context.json file for JSON-LD compliance of the metadata models.

Important files in this repository include:

  • - contains the models
  • - contains functions for validating, migrating, and aggregating metadata
  • - converts the Dandiset metadata to a Datacite metadata structure

The generated JSON schemas can be used together with VJSF to create a UI for Dandiset metadata modification as used for Dandiset metadata modification on

Also Pydantic models are used by DANDI Client/Library to validate metadata while submitting data to the archive, and later by the DANDI Archive itself to ensure that all metadata conforms the model before Dandiset is allowed to be published and gain a DOI. Such DOI generation is done via Datacite service, and dandi-schema library produces Datacite metadata records out of the Pydantic models.


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