What is predicate in XPath?

Answer»

Predicate are used to find specific node or a node containing specific value and are defined using [...] .

Expression	Result
/class/student[1]	Selects the first student element that is the child of the class element.
/class/student[last()]	Selects the last student element that is the child of the class element.
/class/student[last()-1]	Selects the last but one student element that is the child of the class element.
//student[rollno='493']	Selects all the student elements that have an attribute named rollno with a value of '493'

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