This is in regards to the BIDS schema, where yaml files specify the required/recommended suffixes, entities, and extensions for BIDS file names. However, the BIDS spec specifies select fields in the JSON metadata that are either required, recommended, or optional. For example, functional MRI acquisitions must have the RepetitionTime field in the corresponding JSON file. Is this something that can be added to the schema? I'd be happy to open a PR if this seems worthwhile.