This presentation delineates the framework and methodologies underlying single-source publishing within the Open Journal Systems (OJS) environment, emphasizing the utilization of Extensible Markup Language (XML) for structured content management. Single-source publishing is characterized by the use of a centralized content repository, typically established at the production stage, to facilitate the generation of multiple output formats, thereby ensuring content consistency, scalability, and operational efficiency. The discourse introduces XML as a foundational markup language defined by the World Wide Web Consortium (W3C) standards, renowned for its platform independence, hierarchical structuring, and extensibility. The Journal Article Tag Suite (JATS) is examined as an XML schema optimized for the encoding and exchange of scholarly article metadata and content. Specific JATS constructs for article front matter, body, and back references are explicated, showcasing XML's capacity to represent complex document structures. The presentation further elaborates on the OJS single-source publishing workflow, incorporating tools such as the docxConverter for initial document conversion, the Texture Editor for content refinement, and external parsers (e.g., jatsParser) for output rendering. The workflow's outputs, including PDF and HTML galley proofs, are visualized using OJS-integrated viewers like lensGalley. Additionally, the adoption of open-source collaborative editors, exemplified by Fidus Writer, is highlighted as a mechanism for enhancing multi-author contributions and version control. By integrating XML and JATS within the OJS infrastructure, this approach addresses the imperative for scalable, interoperable, and reusable content management systems in scholarly publishing, thereby aligning with contemporary demands for digital dissemination and open-access distribution.