Which `entity-label` pairs do we need in a physio file standing on its own (i.e. in its own modality)?

[smoia]

BIDS file naming uses entity-label pairs to specify the content of that data.
Which ones do we need?

References #13 and supersedes #9

[ShiyuBelleWang]

List of entity we could use when physio is its own modality/file:

• sub
• ses
• task
• acq
• run
• proc
• split
• recording

[m-miedema]

Acq is usually used for non-physio, while recording was introduced (as far as I know) to achieve the same thing for physio. I believe that acq would really correspond to the name of the concurrent non-physio files, so should we remove acq (for independent use)?

[m-miedema]

Trying to keep track as we discuss
desc - for derivatives, we should not use in raw BIDS data names
acq - is there anything in device parameters we would change and reflect with this?
proc - might solve issues with raw 'derived' data

[m-miedema]

Highly relevant: bids-standard#2358