XSLT/XPath test for 'Null'

Question

I have the following which checks for a string within the xml... however, I need to create another test to check for 'Null' or no text within the variable `$validItems` at the 1st line... ```

``` How would I go about testing the variable xsl:if test=$validItems?

Accepted Answer

If I understand what you're asking for, ``` ``` will do it. In other words, "if there is an element in the $validItems node-set that has a Caption or CalltoAction child element whose string value is empty". You could also say ``` ```

XSLT/XPath test for 'Null'

Solution

Problem