gistfile1.txt

<xhtml:html xmlns:xforms="http://www.w3.org/2002/xforms"
    xmlns:f="http://orbeon.org/oxf/xml/formatting"
    xmlns:xhtml="http://www.w3.org/1999/xhtml"
    xmlns:xxforms="http://orbeon.org/oxf/xml/xforms"
    xmlns:widget="http://orbeon.org/oxf/xml/widget"
    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:xbl="http://www.w3.org/ns/xbl"
    xmlns:xxbl="http://orbeon.org/oxf/xml/xbl"
    xmlns:exf="http://www.exforms.org/exf/1-0"
    xmlns:howto="http://www.orbeon.com/howto">

    <xhtml:head>
        <xhtml:title>Session</xhtml:title>
        <xforms:model>
            <xforms:instance id="from-session"><dummy/></xforms:instance>
            <xforms:insert ev:event="xforms-model-construct-done" nodeset="instance('from-session')" 
                origin="xxforms:get-request-attribute('session-howto')"/>
            <xforms:instance id="ui">
                <instance>
                    <value/>
                </instance>
            </xforms:instance>
        </xforms:model>
    </xhtml:head>
    <xhtml:body>
        <xhtml:div>
            <xforms:input ref="instance('ui')/value">
                <xforms:label>Value:</xforms:label>
            </xforms:input>
            <fr:button>
                <xforms:label>Store value in session</xforms:label>
                <xforms:action ev:event="DOMActivate">
                    <xforms:insert context="." origin="xxforms:set-request-attribute('session-howto', instance('ui'))"/>
                    <xforms:toggle case="reload-page"/>
                </xforms:action>
            </fr:button>
            <fr:button>
                <xforms:label>Reset content of session</xforms:label>
            </fr:button>
        </xhtml:div>
        <xhtml:div>
            <xforms:switch>
                <xforms:case/>
                <xforms:case id="reload-page">Try reloading this page to see the content of the session.</xforms:case>
            </xforms:switch>
        </xhtml:div>
    </xhtml:body>
</xhtml:html>