XPath expressions are often used by: Select the correct answer.

Question

Options

• AXSLT and XQuery
• BXSLT and WSDL
• CXQuery and SOAP
• DXQuery only

• A
  89% (24)
• C
  4% (1)
• D
  7% (2)

Explanation

XPath expressions are a core dependency of both XSLT (for selecting and transforming nodes in XML documents) and XQuery (for querying and extracting data from XML), making A correct - these two technologies were essentially built around XPath as their navigation language.

Why the distractors fail:

• B (XSLT + WSDL): WSDL describes web service interfaces and does not use XPath for navigation or querying.
• C (XQuery + SOAP): SOAP is a messaging protocol for web services; it transports XML but does not use XPath expressions as part of its specification.
• D (XQuery only): XQuery does use XPath, but excluding XSLT is wrong - XSLT relies on XPath to match and select nodes in the source tree.

Memory tip: Think of XPath as the "address system" for XML. XSLT and XQuery both need to point at specific nodes - XSLT to transform them, XQuery to query them - so both depend on XPath. WSDL and SOAP are about sending XML, not navigating it.

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