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9.7. XPath Expressions

In addition to material already covered, XPath provides some basic mathematical processing. However, it is important to remember that all numbers in XPath are floating-point double precision. In addition, there are special representations for positive and negative infinity, as well as NaN (Not a Number).

XPath also provides the five basic arithmetic operators shown in Table 9-2.

Table 9-2. XPath Arithmetic Operators

Operator

Description

+

Addition

-

Subtraction

*

Multiplication

div

Division

mod

Modula, sometimes referred to as the remainder, or what's left over after division



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