misonneh's Blog

Zephyrus made

Query Parser Syntax

• + : Terms after the "+" symbol MUST EXIST somewhere in the field of a single document.
• - : "-" EXCLUDES documents that contain the term after it.
• && : Looks for document with BOTH terms on either side -- an intersection document.
• || : EITHER of the terms exist in a document -- a union document.
• ! : The NOT operator excludes documents that contain the term after NOT. This is equivalent to a difference using sets. The symbol ! can be used in place of the word NOT.
• ( ) : Group clauses to form sub queries. One query within brackets and another outside.
• { } : Inclusive range queries are denoted by square brackets.
• [ ] : Exclusive range queries are denoted by curly brackets. Eg. title:{Aida TO Carmen}
• ^ : Use with a boost factor (a number) at the end of the term you are searching. The higher the boost factor, the more relevant the term will be.
• " : Specific term/phrase without any operators in-between. Same as google.
• ~ : Search for a term similar in spelling. Include a number between 0 and 1 to specify degree of similarity with the spelling. For eg. spelling~0.7. Search for 2 terms with x words of each other. For eg. "word1 word2"~10
• * : Multiple character wildcard search.
• ? : Single character wildcard search
• : : Specify field.
• \ : Use the \ before the character to escape that character.

Default fields available on citeulike:

• title
• journal
• abstract
• username
• tag
• surname
• journal
• issn
• isbn
• publisher

Search Syntax Reference

Int J Epidemiol (23 November 2007) - no advantage in excluding studies that appear not to be in HWE

tag: fundamental concepts s1 (fundamental concepts in genetics series) - genetics, statistics

** Cordell: gxg