Keep track of study-specific HED extensions
HED schema allows for extension at the end if you want to give more detailed descriptions or use labels that are currently not in the schema. Keeping track of these added labels across datasets would be good to:
- Make sure we do not use different labels for the same thing
- Make sure we don't use the same labels for something distinct
- Make sure added terms are still properly defined
- When labels are used across datasets this should be communicated to the HED developers since it might be a good reason for a schema extension
All information is currently stored on study level. It might require an additional HED type of file where you identify the extensions and define them. I will also discuss this with the HED people, would be a good thing to add a requirement for such a thing.