MOD 10 (Number part)

A type 'MOD 10' number part creates a check digit according to the Luhn-Algorithm, also known as 'Modulo 10' or 'mod 10' algorithm as well as the Double-add-Double-method.

The Repeatable element Selected part accepts references to other number parts, which are concatenated as input to the checksum calculation.

►IMPORTANT◄ The algorithm accepts decimal digits (0-9) exclusively. All other characters (letters or special characters) are omitted from the concatenation of values provided by Selected parts. Effectively, this makes the checksum calculation robust against non-numeric fill characters or separators. On the other hand dynamic number parts (see Dynamic (Number part)) should not specify base values > 10.

Components in example:

• Country: Fixed (Number part) with the value 400 (prefix for Germany)

• Company: Wert über Resolver (Nummernteil), extracting a 4-digit company code from a text attribute in the data context

• Article: Dynamic (Number part), automatically incremented 5-digit article code

Since the preview (right in picture) does not feature a data context for the Wert über Resolver (Nummernteil), the company code resolves as '0000'.

►NOTE◄ For obvious reasons it does not make sense to include the number part for the checksum as a Selected part.