XSLT, 2nd Edition

XPath Operators

XPath supports a number of operators that make your expressions more powerful. We’ll look at each of them here.

[1.0] The first two sections here cover all of the XPath 1.0 operators except the vertical bar (|), the union operator. Only the vertical bar is supported in XPath 1.0; the new union keyword is supported only in XPath 2.0. See the section [2.0] Set Operators—except, intersect, and union” later in this chapter for the details of the union operator (|) and the union keyword.

[2.0] In XPath 2.0, some operators work with dates, times, and durations. For example, you can add 12 hours to an xs:dayTimeDuration if you want. We cover the operators and features specific to XPath 2.0 after looking at the features common to XPath 1.0 and 2.0.