Expressive Power

(a) Multimedia objects

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A wide variety of basic objects (issue 1):

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Discrete objects, Continuous Objects.

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map, unmap, start, stop, pause, resume.

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The possibility to control the delivery of continuous objects (issue 2):

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par_min, par_master, equal.

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Interactivity capabilities (issue 3):

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activable, deactivable, click.

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Temporal style definitions (issue 4):

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styleon, styleoff.

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A support for unpredictable objects (issue 5):

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Continuous objects are unpredictable if their duration is not known beforehand.

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Buttons are by nature always unpredictable.

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 end.

(b) Temporal Composition (issue 6)

(c) Interactions (issue 7)

Two kinds of interactions can be distinguished:

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Temporal Access Control (TAC): pause, resume, fast-forward, etc .

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Document interactions: buttons, hyperlink.

Document interactions can be classified in two classes according to their associated semantics.

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global interaction: hyperlink

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local interaction: button

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local vs global.