| 1. Use nouns and objects as query keywords. |
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Example: planet or planets |
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Why Important? Actions (verbs), modifiers (adjectives, adverbs, predicate subjects), and conjunctions are either "thrown away" by the search engines or too variable to be useful |
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Topic No: 6, 7, 8 |
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| 2. Use 6 to 8 keywords in query. |
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Example: new, planet, planets, discovery, solar, system |
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Why Important? More keywords, chosen at the appropriate "level", can reduce the universe of possible documents returned by 99% or more. |
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Topic No: 8, 10 |
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| 3. Truncate words to pick up singular and plural versions. |
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Example: planet* or discover* |
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Why Important? Use asterisk wildcard. The wildcard tells the search engine to match all characters after it, preserving keyword slots and increasing coverage by 50% or more. |
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Topic No: 9 |
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| 4. Use synonyms via the OR operator. |
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Example: discover* OR find |
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Why Important? Cover the likely different ways a concept can be described; generally avoid OR in other cases |
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Topic No: 11 |
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| 5. Combine keywords into phrases where possible. |
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Example: "solar system*" |
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Why Important? Use quotes to denote phrases. Phrases restrict results to EXACT matches; if combining terms is a natural marriage, narrows and targets results by many times. |
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Topic No: 12 |
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| 6. Combine 2 to 3 "concepts" in query. |
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Example: "solar system", "new planet*", discover* OR find |
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Why Important? Triangulating on multiple query concepts narrows and targets results, generally by more than 100-to-1. |
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Topic No: 20 |
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| 7. Distinguish "concepts" with parentheses. |
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Example: ("solar system") ("new planet*") (discover* OR find) |
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Why Important? Nest single query "concepts" with parentheses. (Overkill for now, but good practice when first learning.) Simple way to ensure the search engines evaluate your query in the way you want, from left to right. |
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Topic No: 19 |
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| 8. Order "concepts" with subject first. |
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Example: ("new planet*") (discover* OR find) ("solar system") |
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Why Important? Put main subject first. Engines tend to rank documents more highly that match first terms or phrases evaluated. |
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Topic No: 7, 19, 20 |
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| 9. Link "concepts" with the AND operator. |
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Example: ("new planet*") AND (discover* OR find) AND ("solar system") |
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Why Important? AND glues the query together. The resulting query is not overly complicated nor nested, and proper left-to-right evaluation order is ensured. |
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Topic No: 14, 20 |
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| 10. Issue query to full "Boolean" search engine or metasearcher. |
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Example: ("new planet*") AND (discover* OR find) AND ("solar system") |
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Why Important? Full-Boolean engines give you this control; metasearchers increase Web coverage by 3- to 4-fold. |
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Topic No: 3, 35, 36, 38 |