XPath Tutorial

XPath Reference Manual

XPath expressions can return a node set, string, logical value, and number.

The following operators are available in XPath expressions:

Operators	Description	Example	Return value
\|	Calculate two node sets	//book \| //cd	Return all node sets that have book and cd elements
+	Addition	6 + 4	10
-	Subtraction	6 - 4	2
*	Multiplication	6 * 4	24
div	Division	8 div 4	2
=	Equal to	price=9.80	If price is 9.80, return true. If price is 9.90, return false.
!=	Not equal to	price!=9.80	If price is 9.90, return true. If price is 9.80, return false.
<	Less than	price<9.80	If price is 9.00, return true. If price is 9.90, return false.
<=	Less than or equal to	price<=9.80	If price is 9.00, return true. If price is 9.90, return false.
>	Greater than	price>9.80	If price is 9.90, return true. If price is 9.80, return false.
>=	Greater than or equal to	price>=9.80	If price is 9.90, return true. If price is 9.70, return false.
or	Or	price=9.80 or price=9.70	If price is 9.80, return true. If price is 9.50, return false.
and	And	price>9.00 and price<9.90	If price is 9.80, return true. If price is 8.50, return false.
mod	Calculate the remainder of division	5 mod 2	1