| Text
Retrieval |
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| 1.
Text retrieval is more complex than data retrieval from DBMS. |
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| 2.
Distinguish searching for word matches from concept matches. |
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| 3.
Distinguish subject from keyword search: |
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| Subject:-->Search on a controlled
vocabulary (e.g., LC subject |
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| headings). The results point to documents. |
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| Keyword-->Search all words in
particular fields/text fragments. |
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| The results
point to documents. |
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| 4.
Distinguish exact match from partial match (ranked) retrieval |
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| 5.
Distinguish ASCII/UNICODE objects from bit maps |
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