An abstraction layer is provided between databases of back office systems and a markup language based interface, which may allow Web access to data in the databases of the back office systems. Schemas, metadata and validation files are generated from an intermediary representation of the database, which may be flat, non-hierarchical files. Markup language based templates may be generated based on the schemas, metadata and validation files. Markup documents or “markup” may be generated using the templates and the schemas, metadata and validation files. Workflow may be defined and imposed on the generation of the markup.