Abstract: Structured-format documents are produced in a process in which a file in a particular word processing format (input A) or in any other format (Input B) are converted (2) to a particular word processor format. The system loads a parameter activation table which sets document parameter values to allow DTDs to be automatically implemented. The document is cleaned (5) and tagged (6). The tagging provides an important link to allow automatic conversion at a later stage in the process. There is copy-editing (7) followed by validation of the file preparation stage. The involves automatic validation of tags, including validation of their order and nesting arrangement. Automatic conversion to SGML is performed in sequence of symbol/character conversion (20), tag conversion (21), equation processing(22), and floating element processing (23). Final validation (24) is then performed.