Matches any uppercase character from A to Z. Matches any lowercase character from a to z. Matches either a, b or c from within the square brackets. The dollar symbol matches the end of a string without consuming any character. The caret symbol matches the start of a string without consuming any character. Regex in KoboToolbox should always be written in-between the apostrophes regex(., ' ') as shown in the examples. In addition to the examples and tips provided below, please visit
Regex can also be coded in XLSForm, under the constraint column: typeĪlternatively, you can create a calculate question type and then define the (Optional) Add a custom Error Message for the person entering data to see Quotation marks ( ' ') needs to conform to the established regex rules. Refers to ‘this question’, while the regular expression inside the
#Regex for number should be 10digits validation code
In the Validation Code box, enter your regex formula between the quotation Go to Validation Criteria and choose the Manually enter your validation To use a regex in KoboToolbox, follow these steps ¶ controlling the entry of mobile number toĮxactly 10 digits, controlling the entry of a valid email id etc.).
KoboToolbox supports regex to control the length and characters during dataĮntry to a particular question (e.g. Validate, search, extract, and restrict text in most programming languages. Restricting Text Responses With Regular Expressions ¶Ī regular expression, or regex, is a search pattern used for matching specificĬharacters and ranges of characters within a string.
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