XForms: inserting a subitem for all list item with a cycle

If I have a XForms instances like

<xforms:instance id="myvrs">
    <myvrs>
        <subitem />
    </myvrs>
</xforms:instance>
<xforms:instance id="tmp">
    <temp>
        <item><subitem>11</subitem></item>
        <item><subitem>21</subitem><subitem>22</subitem></item>
        <item></item>
    </temp>
</xforms:instance>

How to use a cycle like

<xforms:trigger>
    <xforms:label>button</xforms:label>
    <xforms:action events:event="DOMActivate">
    forall in instance('tmp')/item
        <xforms:insert context="instance('tmp')/item" origin="instance('myvrs')/subitem" />
    endforall
    </xforms:action>
</xforms:trigger>

That i can get instance

<xforms:instance id="tmp">
    <temp>
        <item><subitem>11</subitem><subitem></subitem></item>
        <item><subitem>21</subitem><subitem>22</subitem><subitem></subitem></item>
        <item><subitem></subitem></item>
    </temp>
</xforms:instance>

Thank you

Solution

To iterate in XForms 1.1 you need to use the while attribute (see 10.18 Iteration of XForms Actions).

In your case that can be done with an additional instance:

<xf:instance id="iterator">
    <iterator xmlns=""></iterator>
</xf:instance>

And the action could then be:

<xf:action ev:event="DOMActivate">
    <xf:setvalue ref="instance('iterator')" value="1"></xf:setvalue>
    <xf:action while="instance('iterator') &lt; count(instance('tmp')/item)">
        <xf:insert context="instance('tmp')/item[position()=instance('iterator')]"
            origin="instance('myvrs')/subitem" nodeset="subitem" position="after"></xf:insert>
        <xf:setvalue ref="instance('iterator')" value="instance('iterator') + 1"></xf:setvalue>
    </xf:action>
</xf:action>

Note that this is standard XForms 1.1 and that should work with other implementations.

The full XForms would be:

<html xmlns:xf="http://www.w3.org/2002/xforms" xmlns="http://www.w3.org/1999/xhtml"
    xmlns:ev="http://www.w3.org/2001/xml-events" xmlns:xs="http://www.w3.org/2001/XMLSchema">

    <head>
        <title>Insert for all</title>
        <xf:model>
            <xf:instance id="myvrs">
                <myvrs xmlns="">
                    <subitem></subitem>
                </myvrs>
            </xf:instance>
            <xf:instance id="tmp">
                <temp xmlns="">
                    <item>
                        <subitem>11</subitem>
                    </item>
                    <item>
                        <subitem>21</subitem>
                        <subitem>22</subitem>
                    </item>
                    <item></item>
                </temp>
            </xf:instance>
            <xf:instance id="iterator">
                <iterator xmlns=""></iterator>
            </xf:instance>
        </xf:model>
    </head>
    <body>
        <xf:trigger>
            <xf:label>button</xf:label>
            <xf:action ev:event="DOMActivate">
                <xf:setvalue ref="instance('iterator')" value="1"></xf:setvalue>
                <xf:action while="instance('iterator') &lt; count(instance('tmp')/item)">
                    <xf:insert context="instance('tmp')/item[position()=instance('iterator')]"
                        origin="instance('myvrs')/subitem" nodeset="subitem" position="after"></xf:insert>
                    <xf:setvalue ref="instance('iterator')" value="instance('iterator') + 1"></xf:setvalue>
                </xf:action>
            </xf:action>
        </xf:trigger>
        <fr:xforms-inspector xmlns:fr="http://orbeon.org/oxf/xml/form-runner"></fr:xforms-inspector>
    </body>
</html>