This form tests the stable scope of xpath in an XForms implementation

xpath-stable-scope-test.xhtml

<?xml version="1.0" encoding="UTF-8"?>
<xhtml:html
    xmlns:xhtml="http://www.w3.org/1999/xhtml"
    xmlns:ev = "http://www.w3.org/2001/xml-events"
    xmlns:xf="http://www.w3.org/2002/xforms"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    xmlns:fr="http://orbeon.org/oxf/xml/form-runner"
    xmlns:xxf="http://orbeon.org/oxf/xml/xforms"
    xmlns:idc="http://www.inventivedesigners.com/xbl"
    xmlns:xi="http://www.w3.org/2001/XInclude">
    <xhtml:head>
        <xhtml:title>Test XPath stable scope</xhtml:title>
        <xf:model id="m-default">
        	<!-- Instance that holds all jobs -->
            <xf:instance id="i-default" xxf:read-only="true">
            	<root xmlns="">
            		<date-time-model-construct-done></date-time-model-construct-done>
            		<date-time-model-calculate></date-time-model-calculate>
            		<date-time-model-calculate-dependant></date-time-model-calculate-dependant>            		
            		<date-time-model-required>foo</date-time-model-required>
            	</root>
            </xf:instance>
            
            <xf:bind id="b-date-time-model-calculate" ref="date-time-model-calculate" calculate="now()" />
            <xf:bind id="b-date-time-model-calculate-dependant" ref="date-time-model-calculate-dependant" calculate="../date-time-model-calculate" />
            <!-- <xf:bind id="b-date-time-model-required" ref="date-time-model-required" required="seconds-from-dateTime(date-time-model-construct-done) &lt; (seconds-from-dateTime(now()) - 5)" /> -->
            <xf:bind id="b-date-time-model-required" ref="date-time-model-required" required="seconds-from-dateTime(xs:dateTime(date-time-model-construct-done)) &lt; (seconds-from-dateTime(xs:dateTime(now())) - 5)" />
            
            <xf:setvalue ev:event="xforms-model-construct-done" ref="date-time-model-construct-done" value="now()" />
        </xf:model>
     </xhtml:head>
     <xhtml:body>
     	<xhtml:div>
     		<xf:trigger>
	     		<xf:label>Rebuild</xf:label>
	     		<xf:rebuild ev:event="DOMActivate"/>     		
     		</xf:trigger>
     		<xf:trigger>
	     		<xf:label>Recalculate</xf:label>
	     		<xf:recalculate ev:event="DOMActivate"/>     		
     		</xf:trigger>
     		<xf:trigger>
	     		<xf:label>Revalidate</xf:label>
	     		<xf:revalidate ev:event="DOMActivate"/>     		
     		</xf:trigger>
     		<xf:trigger>
	     		<xf:label>Refresh</xf:label>
	     		<xf:refresh ev:event="DOMActivate"/>     		
     		</xf:trigger>
     		<xf:trigger>
	     		<xf:label>Action</xf:label>
	     		<xf:message ev:event="DOMActivate"><xf:output value="now()"/></xf:message>     		
     		</xf:trigger>
     	</xhtml:div>

     	<xhtml:div>
	     	<xf:output value="now()">
	     		<xf:label>UI binding: </xf:label>
	     	</xf:output>
	    </xhtml:div>

     	<xhtml:div>
     		<xf:output bind="b-date-time-model-calculate">
     			<xf:label>Bind calculate: </xf:label>
     		</xf:output>
     	</xhtml:div>
     	
     	<xhtml:div>
     		<xf:output bind="b-date-time-model-calculate-dependant">
     			<xf:label>Bind calculate dependant: </xf:label>
     		</xf:output>
     	</xhtml:div>
     	
     	<xhtml:div>
     		<xf:output ref="date-time-model-construct-done">
     			<xf:label>Model construct done: </xf:label>
     		</xf:output>
     	</xhtml:div>
     	
     	<xhtml:div>
     		<xf:input bind="b-date-time-model-required">
     			<xf:label>Required after 5sec: </xf:label>
     		</xf:input>
     	</xhtml:div>
     </xhtml:body>
</xhtml:html>