RegEx - Input Validation

The RegEx metadata type can be used to validate and enforce that users enter a value in a specific format.

For example, if a production ID must follow a strict rule — one uppercase letter followed by five digits — this metadata type can ensure that only valid IDs are accepted.

The corresponding regular expression is:

^[A-Z]\d{5}$

This expression enforces the following:

• ^ — start of the string

• [A-Z] — exactly one uppercase letter

• \d{5} — exactly five digits (0–9)

• $ — end of the string

As a result, valid values would include A12345 or Z00001, while entries such as AA12345, a12345, or A1234 would be rejected.

To configure this, a regular expression (regex) pattern must be defined. If you need help creating a suitable expression, you can use online generators or tools such as: https://www.leiga.com/free-tools/regex-expression-generator

Enter the regex pattern in the Default Value field.

The Value field should remain empty. The displayed warning can be ignored.

Regex metadata

Limitation

If a RegEx metadata type is assigned to either a group or a metadata set, the field must always be filled with a valid value. This metadata type effectively behaves as a mandatory field, because the input validation prevents saving empty or invalid values. Disabling this requirement is not possible.