Investigate json-schema and JSON-LD for specifying the metadata schema

[machristie]

Instead of implementing our own mechanism for specifying a JSON schema, should we just use https://json-schema.org/ ?

• Suresh: Some examples of JSON schema in scientific context - https://github.com/materials-data-facility/data-schemas/tree/master/schemas
• Suresh: Another option is to consider JSON-LD. Particularly it will go well with schema.org vocabulary.
  • Geoscience examples - https://github.com/ESIPFed/science-on-schema.org and https://geocodes.earthcube.org/#/landing
  • NF: Initial draft of a NIDM-FSL/FSL FEAT extractor psychoinformatics-de/datalad-hirni#102

The investigation should evaluate what are the advantages to adopting either json-schema or JSON-LD. What do we get by adopting them over our own API approach? Also, where are they deficient? I imagine we'll still need some metadata schema definition API to specify things like the type of index to create, etc.