Conclusion
On the long road to standardization, XPath seems like the first significant step toward a universal query language to keep up with the universal protocol (HTTP), the universal data description language (XML), and the universal remote procedure call protocol (SOAP).
With XPath, you gain the ability to identify and process a group of related nodes from an XML-driven data source. This ability can be exploited by a number of different client environments. XML DOM classes, for example, can use XPath for in-memory data retrieval. XPath is also great for querying XML representations of relational data held both in disconnected structures (such as XmlDataDocument) and in more traditional APIs like XML Extensions for SQL Server 2000. (See ...
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