not()
not()
The not
function evaluates a boolean expression and returns the opposite value.
Syntax
not(expression )
Arguments
expression
- The expression is evaluated exactly as if it were passed as an argument to the boolean() function-
Returns
True for an expression that evaluates to false; false for an expression that evaluates to true.
Notes
- This function should behave similarly to the boolean() function except that it returns the opposite value-
- You can test if an element doesn't have some attribute-
<xsl:for-each match="//a[not(@name and @name = 'badname')]"> <!-- iterates over any <a> element in the document, that either has no 'name' attribute at all, or it has one, but its value is not "badname". --> </xsl:template>
Defined
Gecko support
Supported.
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/XPath/Functions/not