Populate checkboxes with service

gistfile1.xml

<xh:html xmlns:xh="http://www.w3.org/1999/xhtml" xmlns:xf="http://www.w3.org/2002/xforms"
         xmlns:xs="http://www.w3.org/2001/XMLSchema"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:ev="http://www.w3.org/2001/xml-events"
         xmlns:xi="http://www.w3.org/2001/XInclude"
         xmlns:xxi="http://orbeon.org/oxf/xml/xinclude"
         xmlns:xxf="http://orbeon.org/oxf/xml/xforms"
         xmlns:exf="http://www.exforms.org/exf/1-0"
         xmlns:fr="http://orbeon.org/oxf/xml/form-runner"
         xmlns:saxon="http://saxon.sf.net/"
         xmlns:sql="http://orbeon.org/oxf/xml/sql"
         xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
         xmlns:fb="http://orbeon.org/oxf/xml/form-builder">
    <xh:head>
        <xh:title>Scrollable checkbox populated by action</xh:title>
        <xf:model id="fr-form-model" xxf:expose-xpath-types="true">

            <!-- Main instance -->
            <xf:instance id="fr-form-instance" xxf:exclude-result-prefixes="#all">
                <form>
                    <section-1>
                        <forms-regular/>
                        <forms-scrollable/>
                        
                    </section-1>
                </form>
            </xf:instance>

            <!-- Bindings -->
            <xf:bind id="fr-form-binds" ref="instance('fr-form-instance')">
                <xf:bind id="section-1-bind" name="section-1" ref="section-1">
                    <xf:bind id="forms-regular-bind" ref="forms-regular" name="forms-regular"/>
                    <xf:bind id="forms-scrollable-bind" ref="forms-scrollable" name="forms-scrollable"/>
                    
                </xf:bind>
            </xf:bind>

            <!-- Metadata -->
            <xf:instance xxf:readonly="true" id="fr-form-metadata" xxf:exclude-result-prefixes="#all">
                <metadata>
                    <application-name>community</application-name>
                    <form-name>scrollable-checkbox-action</form-name>
                    <title xml:lang="en">Scrollable checkbox populated by action</title>
                    <description xml:lang="en"/>
                    <singleton>false</singleton>
                </metadata>
            </xf:instance>

            <!-- Attachments -->
            <xf:instance id="fr-form-attachments" xxf:exclude-result-prefixes="#all">
                <attachments>
                    <css mediatype="text/css" filename="" size=""/>
                    <pdf mediatype="application/pdf" filename="" size=""/>
                </attachments>
            </xf:instance>

            <!-- All form resources -->
            <!-- Don't make readonly by default in case a service modifies the resources -->
            <xf:instance id="fr-form-resources" xxf:readonly="false" xxf:exclude-result-prefixes="#all">
                <resources>
                    <resource xml:lang="en">
                        <forms-regular>
                            <label>Forms</label>
                            <hint/>
                            <item>
                                <label>First choice</label>
                                <value>1</value>
                                <hint/>
                            </item>
                            <item>
                                <label>Second choice</label>
                                <value>2</value>
                                <hint/>
                            </item>
                            <item>
                                <label>Third choice</label>
                                <value>3</value>
                                <hint/>
                            </item>
                        </forms-regular>
                        <forms-scrollable>
                            <label>Forms</label>
                            <hint/>
                            <item>
                                <label>First choice</label>
                                <value>1</value>
                            </item>
                            <item>
                                <label>Second choice</label>
                                <value>2</value>
                            </item>
                            <item>
                                <label>Third choice</label>
                                <value>3</value>
                            </item>
                        </forms-scrollable>
                        <section-1>
                            <label>Untitled Section</label>
                        </section-1>
                        
                    </resource>
                </resources>
            </xf:instance>

            <!-- Utility instances for services -->
            <xf:instance id="fr-service-request-instance" xxf:exclude-result-prefixes="#all">
                <request/>
            </xf:instance>

            <xf:instance id="fr-service-response-instance" xxf:exclude-result-prefixes="#all">
                <response/>
            </xf:instance>

            <xf:instance id="form-service-instance" class="fr-database-service"
                         xxf:exclude-result-prefixes="#all">
                <body xmlns:secure="java:org.orbeon.oxf.util.SecureUtils"
                      xmlns:frf="java:org.orbeon.oxf.fr.FormRunner"
                      xmlns:p="http://www.orbeon.com/oxf/pipeline"
                      xmlns:fbf="java:org.orbeon.oxf.fb.FormBuilder">&lt;sql:config xmlns:sql="http://orbeon.org/oxf/xml/sql"&gt;
                &lt;sql:datasource&gt;mysql&lt;/sql:datasource&gt;
    &lt;sql:query&gt;SELECT DISTINCT concat(app, '/', form, ' v', form_version) AS 'form' FROM orbeon_form_definition&lt;/sql:query&gt;
                
            &lt;/sql:config&gt;</body>
            </xf:instance>
            <xf:submission id="form-service-submission" class="fr-database-service"
                           ref="instance('fr-service-request-instance')"
                           resource="/fr/service/custom/orbeon/database"
                           method="post"
                           serialization="application/xml"
                           replace="instance"
                           instance="fr-service-response-instance"/>
            <xf:action id="populate-forms-binding">
                <!-- React to event... on control... -->
                <xf:action ev:event="xforms-ready" ev:observer="fr-form-model" if="true()">
                    <!-- Service to call -->
                    <xf:send submission="form-service-submission"/>
                </xf:action>
                <!-- Request actions -->
                <xf:action ev:event="xforms-submit" ev:observer="form-service-submission">
                    <!-- Get reference to initial request -->
                    <xf:var name="request-instance-name" value="'form-service-instance'" as="xs:string"/>
                    <!-- Copy over to read-write request instance -->
                    <xf:insert ref="instance('fr-service-request-instance')"
                               origin="saxon:parse(instance($request-instance-name))"/>
                    <!--<xf:insert ref="instance('fr-service-request-instance')" origin="instance($request-instance-name)"/>-->
                    <!-- Set values if needed -->
                    <xf:action context="instance('fr-service-request-instance')">
                        <!-- Setvalue actions will be here -->
                    </xf:action>
                </xf:action>
                <!-- Response actions -->
                <xf:action ev:event="xforms-submit-done" ev:observer="form-service-submission"
                           context="instance('fr-service-response-instance')">
                    <xf:action class="fr-itemset-action">
                        <xf:var name="control-name" value="'forms-scrollable'"/>
                        <xf:var name="response-items" value="/response/row"/>
                        <xf:var name="item-label" value="form"/>
                        <xf:var name="item-value" value="replace(form, '\s', '_')"/>
                    </xf:action>
                    <!-- Response actions will be here -->
                </xf:action>
            </xf:action>
        </xf:model>
    </xh:head>
    <xh:body>
        <fr:view>
            <fr:body xmlns:xbl="http://www.w3.org/ns/xbl"
                     xmlns:oxf="http://www.orbeon.com/oxf/processors"
                     xmlns:p="http://www.orbeon.com/oxf/pipeline">
                <fr:section id="section-1-control" bind="section-1-bind">
                    <xf:label ref="$form-resources/section-1/label"/>
                    <fr:grid>
                        <xh:tr>
                            <xh:td>
                                <xf:select id="forms-regular-control" appearance="full" bind="forms-regular-bind">
                                    <xf:label ref="$form-resources/forms-regular/label"/>
                                    <xf:hint ref="$form-resources/forms-regular/hint"/>
                                    <xf:alert ref="$fr-resources/detail/labels/alert"/>
                        
                        
                                    <xf:itemset ref="$form-resources/forms-regular/item">
                                        <xf:label ref="label"/>
                                        <xf:value ref="value"/>
                                        <xf:hint ref="hint"/>
                                    </xf:itemset>
                                </xf:select>
                                
                            </xh:td>
                            <xh:td>
                                <fr:box-select xmlns="http://orbeon.org/oxf/xml/form-builder"
                                               xmlns:xxbl="http://orbeon.org/oxf/xml/xbl"
                                               xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                                               id="forms-scrollable-control"
                                               bind="forms-scrollable-bind">
                                    <xf:label ref="$form-resources/forms-scrollable/label"/>
                                    <xf:hint ref="$form-resources/forms-scrollable/hint"/>
                                    <xf:alert ref="$fr-resources/detail/labels/alert"/>
                     
                     
                                    <xf:itemset ref="$form-resources/forms-scrollable/item">
                                        <xf:label ref="label"/>
                                        <xf:value ref="value"/>
                                    </xf:itemset>
                                </fr:box-select>
                            </xh:td>
                        </xh:tr>
                    </fr:grid>
                </fr:section>
            </fr:body>
        </fr:view>
    </xh:body>
</xh:html>