Infix Notation Queries

An Infix-notations sentence is constructed as

( <Infix-Term1> <Op1> <Infix-Term2> )

Infix Notation Terms are

• Terms with an optional postfix unary operator and/or an optional field specification prefix: [<Field Name>/]<Term>[<PostfixTermOp>][:<Weight>]
• Valid Infix sentences, grouped with ( and ).

A Term is

• A word
• A literal phrase enclosed in " marks.

Postfix TermOps currently supported are:

• * := Right Truncated match.
• ~ := Phoenetic match.
• = := Case Dependant match.
• *= := Case Dependant Right Truncated match.

A weight is a non-zero integer value

• Positive := the larger, the more relevant.
• Negative := the larger, the less relevant.

Binary Operators currently supported are:

• Or := Union (alternatively specified as ||)
• And := Intersection (alternatively specified as &&)
• AndNot := Complement (alternatively specified as !!)
• Xor := Exclusive Union (alternatively specified as ^^)
• Near:= Proximity (alternatively specified as .#.)
• Before:= Ordered Proximity (alternatively specified as .#)
• After:= Ordered Proximity (alternatively specified as #.)
• Adj:= Adjacent Proximity (alternatively specified as ##)
• The following special operators:
  • A Nor B:= NOT (A OR B)
  • A Xnor B:= NOT (A XOR B)
  • A Nand B:= NOT (A AND B)

Examples:

• (dog and cat) := Search for records containing both "dog" and "cat"
• (dog:3 or cat) := Search for records containing either "dog" or "cat" but consider the term "dog" to be 3 times as relevant to the search as the term "cat".
• (title/dog and subject/cat) := Search for records containing both "dog" within the title field and "cat" within the subject field.
• (subject/molecular near biology) := Search for records containing "molecular" within the subject field in the proximity of "biology".
• (abstract/"short subject" and title/"In the hotel") := Search for records containing the both the phrase "short subject" within the abstract field and the phrase "In the hotel" in the title field.

See also: RPN Queries

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