When creating an XSLT file to transform the XML output of an EIB, you must...

When writing XSLT to transform an XML document, you must declare and reference all XML namespaces used in the source XML.

“To accurately access and transform nodes using XPath, every namespace in the source document must be declared in the XSLT stylesheet.”

This ensures that XPath expressions correctly match the fully qualified elements, especially when multiple namespaces are in use.

Why the others are incorrect:

A (most commonly used) would be incomplete.

C (ETV/XTT) are specific Workday terminologies but don't replace namespace declarations.

D is incorrect; namespaces are required to avoid XPath resolution failures.