Converts its argument to a number.
[1.0] An object.
A number. If no argument is passed to the
number function, the context item is
used. The specific rules for converting the argument to a number
are different for XSLT 1.0 and 2.0.
[1.0] Here are the rules for XSLT 1.0:
If the argument is a boolean value, the value
true is converted to the number
1; the value
false is converted to the number
If the argument is a node-set, the node-set is converted
to a string as if it were passed to the
string() function, and then that
string is converted to a number like any other string.
(Remember that the
string() function returns the
string value of the first node in the node-set.)
If the argument is a string, it is converted as follows:
If the string consists of optional whitespace,
followed by an optional minus sign (
–), followed by a number,
followed by whitespace, it is converted to the floating-point value nearest to the
mathematical value represented by the string. (The IEEE
754 standard defines a
round-to-nearest rule; see the
standard for more information.)
Any other string is converted to the value
NaN (not a number).
XSLT 1.0 processors are allowed to support other datatypes. If the argument is any other type, it is converted to a number in a way that depends on that type. See the documentation for your XSLT processor to find out what ...