Validation fails for subjects with labels with initial uppercase

[effigies]

From Neurostars #5472:

The bids specification allows for upper case labels for subjects:

BIDS uses custom user-defined labels in several situations (naming of participants, sessions, acquisition schemes, etc.) Labels are strings and MUST only consist of letters (lower or upper case) and/or numbers.

However when i use upper case e.g sub-X01, the bids validator (http://bids-standard.github.io/bids-validator/) says error 1 “NOT_INCLUDED” and if i use sub-x01 then it passes. I think in this regard, the bids validator is therefore inconsistent with bids specification…

Best wishes,

Ollie Hulme

[effigies]

Another user encountering this in Neurostars #5496.

Anybody know how to debug javascript?

[sappelhoff]

I tried to replicate this on linux Ubuntu 18.04 with master validator and the eeg_matchingpennies example dataset.

1. Validate using bids-validator eeg_matchingpennies/ --> all fine except for empty files
2. Rename sub-05 in the dataset to sub-X01
3. Validate --> same as step 1, ... no additional errors

furthermore given the status in

• https://neurostars.org/t/bids-validator-error-for-upper-case-subject-labels/5472 and
• https://neurostars.org/t/dont-understand-why-validation-fails-when-naming-scheme-matches/5496

I assume that this problem has been solved.