Dear BIDS community,

this PR replaces #850 on BEP034 Computational modelling.

Briefly, in the original PR the new modality comp with datatypes

1. time series (and their derivatives)
2. connectivities
3. model descriptions (equations and parameters)
4. coordinates
5. code

was proposed.

In this new PR we address feedback from the maintainer meeting:

• We now removed the datatype "time series" from the PR and instead will join efforts with the group around issue 713 "Convergence on time series and events" towards making "time series" a BIDS-wide datatype that can also be used in other modalities.
• Furthermore, we will join efforts with BEP017 Generic BIDS connectivity data schema and add the use case "structural connectivity for computational model simulation" to BEP017 to achieve a BIDS-wide connectivity datatype that can be used for different modalities.
• Instead, this new PR now introduces only one new data type "model" with the filename suffixes "_eq" and "_param" and the file extension ".xml" to store the equations and parameters of computational models in LEMS format.
• Lastly, we propose to store the source codes and the machine codes that were used to create computational results in the modality agnostic folder code.

The new PR will be discussed on Jan 11 at 17 CET in the NFDI-Neuro Webinar, please join the discussion.