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The DexterReferenceModel and the AmsterdamModel provide frameworks against which to compare existing systems and guide the creation of new systems (e.g. DeviseHypermedia). In contrast, the Trellis Model was designed to aid the formal analysis of hypertexts.
The Trellis Model describes hypertexts using PetriNets. A PetriNet allows the specification of the browsing semantics of a hypertext by attaching meaning to the connections between nodes. A hypertext is built up of a PetriNet structure, a set of documents, a set of interface components, and a collection of mappings between them.
The Trellis Model can be used to calculate:
The Trellis Model was used to formalise a hypertext 'meta-structure' (the Trellis r-model) that can be used in a similar way to the DexterReferenceModel and the AmsterdamModel.
(--TimMilesBoard)
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-- Last edited October 27, 2002 |
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