HP e-CommerceXML Accelerator sa7150 - Manual (Page 34)

C H A P T E R 3 HP e-Commerce/XML Server Accelerator SA7150 User Guide
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Boolean Operators
Boolean operators are logical operators between expressions. These
operators are used in the PathExpression and the FilterExpression, as
shown below.
• PathExpression BooleanOperator PathExpression
• FilterExpression BooleanOperator FilterExpression
Function Calls
NOTE: FunctionCalls
can only be specified
within FilterExpressions. Function calls allow you to specify partial patterns within
FilterExpressions. FunctionCall expressions are evaluated by using
the FunctionName to identify a supported function, evaluating each
of the arguments if needed, and calling the function passing the
Operator Name Description
and Logical AND operator Performs a logical AND operation
or Logical OR operator Performs a logical OR operation
Boolean Operators
Sample Pattern Description
//restaurant[@genre and
Food_Rating] Matches if there is a restaurant element, a genre attribute, and a
Food_Rating child element. genre and Food_Rating are associated
with the restaurant element.
//restaurant[@genre or
Food_Rating] Matches if there is a restaurant element, a genre attribute, or a
Food_Rating child element. genre and Food_Rating are associated
with the restaurant element.
//restaurant or //theater Matches if there is a restaurant element or a theater element
anywhere in the XML data tree.
Boolean Operator Examples