During May 2025, Guillem Tarres enhanced the rosetta-models/common-domain-model repository by expanding the product taxonomy model to support broader regulatory data integration. He introduced a new 'CSA' value to the TaxonomySourceEnum, enabling representation of the Canadian Securities Administrators within the model. This work focused on explicit enum definition and careful data modeling using the Rosetta language, ensuring the taxonomy sources remain maintainable and extensible for future requirements. Although the scope was limited to a single feature, the update addressed evolving business needs for regulatory coverage and demonstrated a methodical approach to code quality and long-term adaptability in the domain model.