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| What constitutes useful
index |
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| ---- how to evaluate |
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| l | Precision and
Recall do not apply to index |
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| terms. |
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| l | Three basic
criteria: |
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| ¡ | Coherence |
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| ¡ | Usefulness of
index terms |
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| ¡ | Thoroughness of
coverage of document content |
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