How do send many parameter in xforms:submission

I want to send many parameter but I can send 1 parameter

<xforms:submission id="query-submission" ref="instance('query')"
    action="/exist/rest/{{instance('control-instance')/resource}}/?page={{instance('page-instance')}}" method="post"
    replace="instance" instance="response-instance" xxforms:readonly="true"/>
                           
How do send many parameter ?

Thank.
Growth