Interstage Shunsaku Data Manager Application Development Guide - Microsoft(R) Windows(R) 2000/ Microsoft(R) Windows Server(TM) 2003 - - UNIX -

B.3 Search Expressions

Search expressions are used to specify search conditions that apply to XML documents to be retrieved

A search expression consists of one or more conditional expressions and filter expressions.

Refer to B.3.1 Conditional Expressions and B.3.8 Filter Expressions for more information on conditional expressions and filter expressions respectively.

To specify multiple conditional expressions or filter expressions, use logical operators.

Refer to Logical Operators below for more information.

The format for search expressions is shown below.

[Figure B-9 Search Expression Definition Format]

Search expressions must have at least one conditional expression or filter expression.

Logical Operators

Logical operators indicate the logical relationship between two adjacent conditional expressions and filter expressions when multiple expressions are specified.

Logical operators are briefly explained in the following table.

[Table B-2 Logical Operators]

Logical operator	Type of logical operation	Description
AND	AND operation	Links pairs of conditional expressions with the AND operator. Evaluates to TRUE only if the results of both conditional expressions are TRUE. Evaluates to FALSE if either or both conditional expressions are FALSE.
OR	OR operation	Links pairs of conditional expressions with the OR operator. Evaluates to TRUE if either or both conditional expressions are TRUE. Evaluates to FALSE only if both conditional expressions are FALSE.

• The AND operator is evaluated first in search expressions that contain both AND and OR operators.
• Use parentheses '()' to change the order in which the logical operators are evaluated.

In the following example, ([conditional expression 2] OR [conditional expression 3]) is evaluated first.

: Represents a space

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B.3.1 Conditional Expressions

B.3.2 Keywords

B.3.3 Escape Characters

B.3.4 Patterns

B.3.5 Character String

B.3.6 Numeric Values

B.3.7 Compatible Format

B.3.8 Filter Expressions