Should it be possible to index bids invalid files with bids.layout ?

[Remi-Gau]

The reason I am wondering about it is also to because what should be the expected behavior of the following?

I'll say it should put in dataset maximum files that still follow bids syntax. Just makes it easier for unregulated bids datasets.

Will cross check how pybids handles those cases: I would not mind if the general behavior was fairly similar across tools.

Checked with my fellow bids maintainers and in brief pybids has an extra "validate" flag (lightweight filename based validation similar to what is done by parse_filename): if this is set to "false", then even bids invalid files will be indexed.

I think that implementing this behavior could be done but it is beyond the scope of this PR and I suspect it might be potentially annoying enough to implement: I suggest we wait till we have users requests for it.

Originally posted by @Remi-Gau in #268 (comment)