Obtaining a Portion of an XML Document

Usually, you use a query to obtain a portion of an XML document. To obtain the particular elements that you want, you must understand how to obtain an element that is a child of the document element. With this information, you can obtain any elements in the document.

The following figure shows how the XPath processor interprets the /bookstore/book query:

When the XPath processor starts its search at the root node, there is only one element among the immediate children of the root node. This is the document element. In this example, bookstore is the document element.

The query in this figure returns the book elements that are children of bookstore. This query does not return the my:book element, which is also a child of bookstore.

Now you can define queries that obtain any elements you want. For example:



This query returns title elements contained in book elements that are contained in bookstore.

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