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      <h1>xsl:processing-instruction</h1>
      <p>The <code>xsl:processing-instruction</code> element can appear anywhere within an 
<code>xsl:template</code>.
 It causes an XML processing
instruction to be output.</p>
      <p>There is a mandatory <code>name</code> attribute which gives the name of the PI. This attribute is interpreted
as an <i>attribute value template</i>, so it may contain string expressions within curly braces.</p>
      <p>The data part of the PI may be given either by a <code>select</code> attribute or by an enclosed
sequence constructor. If the <code>select</code> attribute is used and the value is a sequence, then
the items in the sequence are output space-separated.</p>
      <p>For example:</p>
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            <code>&lt;xsl:processing-instruction name="submit-invoice"&gt;version="1.0"&lt;/xsl:processing-instruction&gt;</code>
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      <p>Note that special characters occurring within the PI text will <i>not</i>
be escaped.</p>
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