Traversal strategies are defined for a
certain domain structure type.
They describe the semantics of several navigation operations
to move between the pages of a domain.
Each traversal strategy has to provide at least a next page and a previous page operation to define a linear order for all pages of a domain. Such a linear order is the basis for a ``hardcopy'' of a domain.
The code implementing new traversal strategies and domain structure types could be supplied as meta-information of HTML pages (see section 3.4).