Using the jsFiddle echo service

gistfile1.xml

<xhtml:html xmlns:xhtml="http://www.w3.org/1999/xhtml"
      xmlns:xforms="http://www.w3.org/2002/xforms"
      xmlns:xxforms="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"
      xmlns:saxon="http://saxon.sf.net/">
    <xhtml:head>
        <xhtml:title>Using the jsFiddle Echo Service</xhtml:title>
        <xforms:model>
            <xforms:instance id="data">
                <instance>
                    <name/>
                    <length/>
                </instance>
            </xforms:instance>
            <xforms:instance id="jsfiddle-out"><xml/></xforms:instance>
            <xforms:instance id="jsfiddle-in"><dummy/></xforms:instance>
            <xforms:bind ref="length" calculate="string-length(../name)"/>
            <xforms:submission id="echo-submission" method="post"
                    resource="http://jsfiddle.net/echo/xml/"
                    serialization="application/x-www-form-urlencoded"
                    ref="instance('jsfiddle-out')" replace="instance" instance="jsfiddle-in">
                <xforms:setvalue ev:event="xforms-submit" ref="instance('jsfiddle-out')"
                                 value="saxon:serialize(instance('data'), 'xml')"/>
            </xforms:submission>
        </xforms:model>
    </xhtml:head>
    <xhtml:body>
        <xforms:input ref="name">
            <xforms:label>Name: </xforms:label>
        </xforms:input>
        <xforms:submit submission="echo-submission">
            <xforms:label>Send</xforms:label>
        </xforms:submit>
        <xforms:output ref="instance('jsfiddle-in')/length">
            <xforms:label>Length we got back from echo: </xforms:label>
        </xforms:output>
    </xhtml:body>
</xhtml:html>