| Theory
to Practice |
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| • | Design
challenge 1: creating views |
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| – | What
granularities (collections and items) |
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| – | Which
attribute sets? |
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| – | Creating
or extracting metadata |
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| • | Design
challenge 2: |
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| manipulating/controlling
views |
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| – | Perceptual
estimation (e.g., look ahead) |
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| – | Physical
and conceptual inertia |
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