DMN Validator

The tool analyzes DMN XML documents to ensure they conform to DMN 1.3 schema and basic domain expectations. It identifies structural issues such as missing elements, undefined inputs, and absent decision rules, along with simple semantic concerns like unused inputs. It aggregates errors and warnings with optional line/column references to guide remediation. Conceptually, the process involves parsing the DMN document into a model, validating against the official schema, and applying a curated set of domain checks that auditors and developers care about. This approach helps teams verify model quality before integration or deployment. Beneficiaries include business analysts drafting decision tables, solution architects validating model integrity, and developers integrating DMN artifacts into automated pipelines. Unique value comes from combining strict schema validation with practical semantic checks in a single pass, reducing the need for separate tooling and speeding up review cycles. Core features include DMN XML parsing, schema validation, structural checks, and basic semantic verification; optional advanced checks cover cross-entity consistency, FEEL syntax checks, and import resolution. Use cases range from initial model validation during authoring to pre-commit checks in CI workflows, ensuring only compliant DMN models advance to testing environments.