Simple autocomplete

gistfile1.xml

<xh:html xmlns:xh="http://www.w3.org/1999/xhtml"
      xmlns:xf="http://www.w3.org/2002/xforms"
      xmlns:xxf="http://orbeon.org/oxf/xml/xforms"
      xmlns:ev="http://www.w3.org/2001/xml-events"
      xmlns:xs="http://www.w3.org/2001/XMLSchema"
      xmlns:fr="http://orbeon.org/oxf/xml/form-runner">
    <xh:head>
        <xf:model>
            <xf:instance>
                <country/>                                                                                                                                                                                                                                                                                     
            </xf:instance>
        </xf:model>
    </xh:head>
    <xh:body>
        <fr:autocomplete ref="." labelref="country-name/@label"
                         resource="/fr/service/custom/orbeon/controls/countries?country-name={$fr-search-value}"
                         max-results-displayed="4">
            <xf:label>Country code: </xf:label>
            <xf:itemset nodeset="/countries/country">
                <xf:label ref="name"/>
                <xf:value ref="us-code"/>
            </xf:itemset>
        </fr:autocomplete>
    </xh:body>
</xh:html>