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      <h1>Writing a URI Resolver for Output Files</h1>
      <p>Saxon also allows you to write an <code>OutputURIResolver</code>, which performs an
analogous role for URIs specified in the <code>href</code> attribute of <code>xsl:result-document</code>.
This is therefore applicable to XSLT only.
The <code>OutputURIResolver</code> is called when writing of the output document starts, at which point it must
return a JAXP <code>Result</code> object to act as the output destination. It is called again when writing of an output document
is complete.</p>
      <p>You can nominate an <code>OutputURIResolver</code> by calling 
<code>((Controller)transformer).setOutputURIResolver(new UserOutputResolver())</code>,
or by calling <code>factory.setAttribute("http://saxon.sf.net/feature/outputURIResolver", 
new UserOutputResolver())</code>.</p>
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