HP e-Commerce / XML director server appliance sa8250 - Users Guide

C H A P T E R 2 XML Operations

Function Calls

A FunctionCall expression is evaluated by using the FunctionName

to identify a supported function, evaluating each of the arguments if

needed, and calling the function passing the required arguments. It is

an error if the number of arguments is wrong or if an argument is not

of the required type. The result of the FunctionCall expression is the

result returned by the function. A FunctionCall can only be specified

within a FilterExpression.

This table describes the three supported string functions.

Function Description

starts-with(value,

substring)

The starts-with function test whether the string value of value starts the

specified substring. value can be either an element, attribute, or function

call that returns a string value. substring must be a literal value enclosed

in single or double quotes. A Boolean value of TRUE or FALSE is

returned.

contains(value,

substring)

The contains function tests whether value contains the specified

substring. value can be either an element, attribute, or function call that

returns a string value. substring must be a literal value enclosed in single

or double quotes. A Boolean value of TRUE or FALSE is returned.

translate(value,

fromString,

toString)

The translate function replaces characters in the value string if they

appear in the fromString with the corresponding characters in the

toString. If a character appears in fromString but not in the

corresponding position in toString, the character will be dropped from

the value string. The result string is returned. value can be either an

element, attribute, or function call that returns a string value. Both

fromString and toString have to be a literal value enclosed in single or

double quotes.

Function Calls