Travel

Roles: traveler, destination, origin, route, position, waypoint, terrain, passage

Movement through space from one place to another, with a current position, a direction of travel, and some relationship to the territory being traversed. The traveler is distinct from the territory: they pass through without owning it, maintain a location at each moment, and can only move forward along a route. This frame underlies much of computing’s vocabulary for sequential access — cursors, iterators, traversal — where a lightweight pointer moves through a data structure the way a traveler moves through a landscape.

As Source Frame (2)

• Network Port → network-communication
• The Iterator Pattern → object-oriented-design