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XPath Predicate

Predicate specifies XPath expressions written in square bracket. It is used to restrict the selected nodes in a node set for some conditions. See the use of predicate in the “employee” example.

Employee.xml

Index	Predicate	Description
1)	/class/employee[1]	It will select first employee element which is child of the class element.
2)	/class/employee[last()]	It will select last employee element which is child of the class element.
3)	/class/employee[@id = 002]	It will select employee element where id is 002.
4)	/class/salary[salary > 10000]	It will select employee element where salary is greater than 10000.

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XPath Predicate Example

Let’s take an example to create a table of <employee> element with their details, by iterating over each employee. This example uses predicate to calculate the position of the employee node and then print the employee details.

Employee.xml

Employee.xsl

Output:

Note:In the above example, you can see that all four queries are fetched.