This paper describes a software infrastructure and design methodology for the presentation of cultural and ecological heritage content in virtual environments, using a nonlinear storytelling approach. We set up a process guideline for the design of the story that leads to artifacts which can be seamlessly transformed and refined what we call an executable story. The result of the scenario design (story authoring) is an XML based description of the story including an enumeration of the resources like geometric models, sounds, and others. This XML based specification is immediately executable on a StoryEngine which has to be provided by the target virtual reality system.
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