Distinguishing raw from derivative data

[m-miedema]

Following some previous discussions, @Remi-Gau commented on our draft that we should re-tool our definition of raw data to be that which is output in a non-BIDS source, while derivatives are data that are derived from a valid BIDS dataset (x).

In that sense, we need to consider what to do when a proprietary data software calculates something we had previously considered to be a derivative (e.g. heart rate), and how to allow our naming conventions and meta-data to reflect this possibility.

[me-pic]

summary of the meeting discussion

@me-pic Potentially introducing a new value for PhyioType, allowing for more keys ? @Sourav-Kulkarni rising the question about what are the format of such data, are they continuously sampled ? Gave the example of how eyetracking BEP was handling blinks
@m-miedema if continuously sample, it can be treated as raw physio timeseries, otherwise behavioral data or part of physioevents.tsv; being clearer about what is raw and what is derivatives based on Remi's comment, but not addressing right now those specific cases

Please add any missing information from that discussion !