ASASA Home ERAU Library Home Help

Concept Search

A primary query mode that lets you enter plain English queries with no operators; automatically does semantic expansion on all query words to the level you set; ranks returned documents for relevance.

Pattern Search

A primary query type that also processes plain English queries, but tolerates spelling differences in either the body of the text or the queries; automatically does pattern expansion on all query words to the number of words you set; ranks returned documents for relevance.

Boolean(NOT,OR,AND) Search

A primary query type that uses traditional Boolean operators to find exact matches for all query words you enter; no ranking of responses; no automatic expansion.

Fielded Search

A query performed against the document metadata, it limits responses by allowing you to enter specific metadata fields (such as a full or partial title, collection, author, etc.). A metadata field search can be done against metadata only (one or more fields at a time) or in conjunction with a full-text keyword query.

Wildcard Search

A query that substitutes part of a word, name, or number with a wildcard character (*, ?, [search expression], _, @, #, \, ^ ) to substitute for unknowns in the search terms or database, or to search for multiple terms; wildcards can be used in Concept or Boolean mode (not Pattern), in full text search or field entries, in multiple words, and even multiple times in one word.

Wildcards Description Example
_ match one or zero characters colo_r
@ match exactly one alpha character gr@y
# match exactly one numeric character #600
\ take the next character literally, not as an operator name\@ptfs.com
* match anything or nothing comput*
? match exactly one character wom?n
^ match any character except the next character 199[^7]
[ ] search expression; can include a hyphen to indicate a range of letters or numbers; will match only one character within the brackets 199[1-5]
adj search expression; Word1 must be found within N words of word2, and word1 must come before word2. word1 word2 adj N
within search expression; Word1 must be found within N words of word2. word1 word2 within N

"Mixed" Search

When you choose a query type (Pattern, Concept, or Boolean), all query words you enter are normally expanded that way. That is, all Concept query words are expanded to related terms via the semantic network. All Pattern words are pattern expanded, and no Boolean words are expanded at all. You can “mix” these query types by entering special operators on specific query words. This causes the terms with operators to be treated differently from the rest of the query terms for whatever query type you are using.

Grouped Term Search

A query (Pattern or Concept) in which terms related to a common concept are grouped together with parentheses in order to improve search accuracy; the words within the parentheses are expanded, matched, and ranked for relevance as a group, instead of as individual words.

Return to the main page