Worked on the SuadeLabs/fire repository to enhance the national identifier schema by introducing a new enum value, 'fsc', to the national_id_type field. Focused on data modeling and schema design using JSON, ensuring that the updated schema improved categorization and downstream validation of national identifiers. Updated the documentation in Markdown to align with the schema changes, including refreshing reference links to the latest standards. Maintained clear commit messages and traceability throughout the process. The work emphasized maintainability and documentation quality, delivering a targeted feature that supports better data classification without introducing new bugs or unnecessary complexity.