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You must select the field to be checked and enter the regular expression. For example:

Image RemovedImage Added

  • [0-9]{4}-[0-9]{4} would allow numbers such as: 1245-7783
  • [0-9]+ EUR$ would allow price tags such as: 34 EUR
  • [a-z]* would allow an empty string, or any lower case word such as: yellow
  • Option [A,B] would allow a selection of options: Option A, Option B or both.

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