Hello @branno813,
In addition to the link of Kal_Lam, pay attention: Restrict an entry with upper case and special characters while entering a form
You may also see other other previous examples here:
and here
Another option might be using the translate function: https://www.w3.org/TR/1999/REC-xpath-19991116/#function-translate.
See example attached. UPPER CASE 02 (Translate).xlsx (9.3 KB)
This form can be deployed from KoBoToolbox!
But it shows a parser error in ODK XLSFormOnline https://getodk.org/xlsform/
Maybe one of the KoBo experts can say more @Xiphware, @Kal_Lam, @stephanealoo ?
Maybe another form of path reference could work better? ( . or ${} didn’t.)
Kind regards
