<xh:html xmlns:form="http://www.w3.org/2001/12/xforms" xmlns:xh="http://www.w3.org/1999/xhtml" xmlns:cf="http://www.cribisnetgroup.com/creditflow/xform">
    <xh:head>
        <form:model>
            <form:instance id="testInstance">
                <form:element>
                    <form:elementInfo>
                        <form:elementProduct Pers="0" Consent="0" />
                    </form:elementInfo>
                </form:element>
            </form:instance>
            <form:schema />
        </form:model>
    </xh:head>
    <xh:body>

...

<form:button href=""  id="Button1000">
        <form:caption href="Add" class="View_Submit" />
         <form:insert nodeset="element/elementInfo/elementProduct[1]" at="/Data/CardData/elementInfo/elementProduct[last()]" position="after" id="dfsgfdgdfg212113213210" />
</form:button>