Knowledge‑driven, ontology‑based software systems are built through conceptual domain modeling. This approach makes data semantics and process logic explicit, enabling rigorous, proof‑based reasoning for checking business rules and validating system behavior. As a result, system decisions become transparent and easily explainable to both experts and stakeholders. Moreover, you can evolve the system over time (adjusting behavior, constraints, and even user‑facing structures) simply by updating the semantic domain model, rather than rewriting large portions of application code.