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Example of Calling the document() Function

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Suppose you have the following XML document:
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&lt;?xml version="1.0" encoding="UTF-8"?&gt; 
              <a shape="rect" name="wp1366176"> </a>
&lt;books&gt; 
              <a shape="rect" name="wp1366177"> </a>

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&lt;bookstore&gt;bookstore1:bookstore1.xml&lt;/bookstore&gt; 
                  <a shape="rect" name="wp1366178"> </a>
&lt;bookstore&gt;bookstore2:bookstore2.xml&lt;/bookstore&gt; 
                  <a shape="rect" name="wp1366179"> </a>
&lt;bookstore&gt;bookstore3:bookstore3.xml&lt;/bookstore&gt;
                  <a shape="rect" name="wp1366180"> </a>

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&lt;/books&gt; 
              <a shape="rect" name="wp1366181"> </a>

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The following query returns the 
    <code class="cCode">bookstore</code> elements:
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/books/bookstore
              <a shape="rect" name="wp1366293"> </a>

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Now suppose you pass this query to the 
    <code class="cCode">document()</code> function as follows:
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document(/books/bookstore)
              <a shape="rect" name="wp1366328"> </a>

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This query returns the root nodes of 
    <code class="cCode">bookstore1.xml</code>, 
    <code class="cCode">bookstore2.xml</code>, and 
    <code class="cCode">bookstore3.xml</code>.

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