Sample Broken Constraint in MarkLogic

brokenconstraint

xquery version "1.0-ml";
declare namespace html = "http://www.w3.org/1999/xhtml";
import module namespace
  search = "http://marklogic.com/appservices/search"
  at "/MarkLogic/appservices/search/search.xqy";

let $optionsconstraints :=
<optionsconstraints xmlns="http://marklogic.com/appservices/search">
<constraint name="ovparty">
    <custom facet="false">
        <parse apply="ovparty" ns="http://stuartmyles.com/ns/mysearch" at="/b-custom-constraint.xqy"/>
    </custom>
</constraint>
</optionsconstraints>

let $options :=
    <options xmlns="http://marklogic.com/appservices/search">
        {
          $optionsconstraints//search:constraint
        }
            <term apply="myterm" ns="http://try.marklogic.com/search-options"
                         at="/search-options.xqy">
              <empty apply="all-results"/>
            </term>
            </options>

let $optionsgood :=
    <options xmlns="http://marklogic.com/appservices/search">
        {   $optionsconstraints//search:constraint}
            </options>

return search:search("ovparty:mitt", $options)