From http://www.w3schools.com (Copyright Refsnes Data)

You Have Learned XPath, Now What?

XPath Summary

This tutorial has taught you how to find information in an XML document.

You have learned how to use XPath to navigate through elements and attributes in an XML document.

You have also learned how to use some of the standard functions that are built-in in XPath.

For more information on XPath, please look at our XPath Reference.

The next step is to learn about XSLT, XQuery, XLink, and XPointer.

XSLT

XSLT is the style sheet language for XML files.

With XSLT you can transform XML documents into other formats, like XHTML.

If you want to learn more about XSLT, please visit our XSLT tutorial.

XQuery

XQuery is about querying XML data.

XQuery is designed to query anything that can appear as XML, including databases.

If you want to learn more about XQuery, please visit our XQuery tutorial.

XLink and XPointer

Linking in XML is divided into two parts: XLink and XPointer.

XLink and XPointer define a standard way of creating hyperlinks in XML documents.

If you want to learn more about XLink and XPointer, please visit our XLink and XPointer tutorial.