Worked on the UBS_M1_TEI repository to enhance TEI XML metadata for La Bruyère.xml, focusing on data quality, semantic tagging, and interoperability. Applied data annotation, XML editing, and data structuring skills to refine section structures, add unique identifiers for authors and publishers, and correct structural inconsistencies. Expanded taxonomy categories and improved person-name tagging, integrating external authority control through VIAF identifiers to support scholarly retrieval and cross-system compatibility. Delivered three features with clear commit history, enabling traceability and reproducibility. The work improved processing readiness and facilitated downstream integration, supporting reliable analytics and retrieval for data consumers in academic contexts.