2.2 Arcs, Traversal, and Behavior
Arcs, Traversal, and Behavior
Using or following a link for
any purpose is called traversal. Even though some kinds
of link can associate arbitrary numbers of resources, traversal always involves
a pair of resources (or portions of them); the source from which traversal is begun is the starting
resource and the
destination is the ending resource. Note that the term "resource"
used in this fashion may at times apply to a resource portion, not a whole
resource.
Information about how to traverse a pair
of resources, including the direction of traversal and possibly application
behavior information as well, is called an arc. If
two arcs in a link specify the same pair of resources, but they switch places
as starting and ending resources, then the link is multidirectional, which
is not the same as merely "going back" after traversing a link.
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