Blog Posts BPMN DMN

DMN: Data Validation Reconsidered

Blog: Method & Style (Bruce Silver)

In a post last summer, I began to question the value of assigning constraints like a range of allowed values to datatypes in DMN, in favor of performing data validation using a decision table inside the decision model. There were a few reasons for this: Data values violating the constraint behaved differently in decision tables and literal expressions. Decision tables produced a runtime error, while the same value in a literal expression might be ignored or simply generate a null result.

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