Tamino XML Server Version 9.7
 —  XQuery 4 Reference Guide  —

xs:double

Construct a double value from an item value.


Syntax

xs:double(item $value) => double

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Description

This is a constructor function that takes an item value as argument and returns a value of type xs:double. If the argument is a literal, then the literal must be a valid lexical form of its type.

As specified in the respective section of the W3C recommendation XML Schema Part 2: Datatypes, a value of type xs:double represents a double-precision floating point number according to IEEE 754-1985. The lexical form uses scientific notation, consisting of the mantissa which must be a decimal number, the letter "E" or "e", and an exponent which must be an integer value.

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Argument

$value

item value

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Example

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Related Syntax Constructs

The following construct(s) refer to this construct:

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