Devices]: Models of Computation relation among models; I.7.2. [Text Processing]: Document Preparation hyperdocument/hypermedia; H.3.3. [Information Storage and Retrieval]: Information Search and Retrieval search process; H.3.4. [Information Storage and Retrieval]: Systems and Software information networks; H.5.1. [Information Interfaces and Presentation]: Multimedia Information Systems hyperdocument navigation and maps. General Terms: Design, Languages, Theory, Modeling. 2 Additional Key Words and Phrases: Hypermedia, Statecharts, Navigational Models, Browsing Semantics, HMBS model. 1. INTRODUCTION A major challenge facing the author of hyperdocuments and hypermedia applications in general is that of suitably organizing complex material. Systematic approaches for defining the structural organization are especially important in the design of large and complex applications. In this case, the use of a model helps to discipline the authoring activity by encouraging development in a s...