XSL / XPath expression to check if a node contains at least one non-empty child

Question

I need to check if an XML node has at least one non-empty child. Applied to this XML the expression should return true

Answer 1

Explanation This will find the first node with a string length greater than zero and then compares such node contents with empty string (the comparison will return the existence of a non-empty string node); this code can also be used to look for a specific criteria in any node, for example identify the existence of a node which contains specific string or starts with some character or any other condition; please use this as the inner condition of the node reference for the code to work its magic.