The information modules will be designed in a way which makes it possible to re-use single information components in other documents (single source publishing principle). The design of the structure allows the re-use of large components (such as whole topics or chapters) as well as the re-use of small components (such as individual paragraphs).

A lot of rule sets and DTDs turn out to be much too complex in everyday use. Working with too complex a structure, authors often lose more time with such rules and structures than they gain by being able to re-use certain modules of information. Therefore, my key criterion when designing a new DTD is a simple, clear and ergonomic structure. The fewer elements and rules the DTD requires, and the fewer levels the element hierarchy comprises, the better.