At the beginning, the Apps that are being developed used mainly one Brainlife datatype: meg/fif (see the documentation on datatypes on BL). A datatype enables Apps to communicate with each other: the output of App A is the input of App B (see Error when running a pipeline with optional files, How to run Apps one after another).
Here we choose to illustrate this datatype mainly with the channels.tsv file, but the principle is the same for the other files in the meg/fif-override datatype.
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