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      <a href="d_xpath.html">Chapter 9: Writing XPath Expressions</a>
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        <a href="d_xpath2.html#wp204661">About the XPath Processor</a>
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        <a href="d_xpath3.html#wp204784">Sample Data for Examples and Testing</a>
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        <a href="d_xpath4.html#wp231713">Getting Started with Queries</a>
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        <a href="d_xpath5.html#wp1541658">Specifying the Nodes to Evaluate</a>
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        <a href="d_xpath6.html#wp924235">Handling Strings and Text</a>
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        <a href="d_xpath7.html#wp925084">Specifying Boolean Expressions and Functions</a>
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        <a href="d_xpath8.html#wp337132">Specifying Number Operations and Functions</a>
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        <a href="d_xpath9.html#wp313717">Comparing Values</a>
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        <a href="d_xpath10.html#wp219142">Finding a Particular Node</a>
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        <a href="d_xpath12.html#wp960970">Obtaining Information About a Node or a Node Set</a>
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        <a href="d_xpath13.html#wp917039">Using XPath Expressions in Stylesheets</a>
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        <a href="d_xpath14.html#wp426747">Accessing Other Documents During Query Execution</a>
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        <a href="d_xpath15.html#wp919260">XPath Quick Reference</a>
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    <span class="BreadCrumbsThisPage">Chapter 9	Writing XPath Expressions</span>
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Chapter 9	Writing XPath Expressions

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The XPath processor allows you to retrieve a subset of an XML document. A query, which is always an XPath expression, returns a well-formed XML node-list or an XPath value object. In XPath 2.0, an expression returns a sequence of XML nodes and/or XPath value objects. 

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This section discusses the following topics:

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        <li>
          <a shape="rect" href="d_xpath2.html#wp204661">About the XPath Processor</a>
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          <a shape="rect" href="d_xpath3.html#wp204784">Sample Data for Examples and Testing</a>
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        <li>
          <a shape="rect" href="d_xpath4.html#wp231713">Getting Started with Queries</a>
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        <li>
          <a shape="rect" href="d_xpath5.html#wp1541658">Specifying the Nodes to Evaluate</a>
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          <a shape="rect" href="d_xpath6.html#wp924235">Handling Strings and Text</a>
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        <li>
          <a shape="rect" href="d_xpath7.html#wp925084">Specifying Boolean Expressions and Functions</a>
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        <li>
          <a shape="rect" href="d_xpath8.html#wp337132">Specifying Number Operations and Functions</a>
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        <li>
          <a shape="rect" href="d_xpath9.html#wp313717">Comparing Values</a>
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        <li>
          <a shape="rect" href="d_xpath10.html#wp219142">Finding a Particular Node</a>
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          <a shape="rect" href="d_xpath11.html#wp203979">Obtaining a Union</a>
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        <li>
          <a shape="rect" href="d_xpath12.html#wp960970">Obtaining Information About a Node or a Node Set</a>
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        <li>
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          <a shape="rect" href="d_xpath14.html#wp426747">Accessing Other Documents During Query Execution</a>
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        <li>
          <a shape="rect" href="d_xpath15.html#wp919260">XPath Quick Reference</a>
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