(: flatten lure structure :)

<lures>
{for $usage in doc("/db/Wiki/BC/lures.xml")/lures/*
 for $configSet in  $usage/*
 for $configuration in $configSet/*
 return 
  <lure>
     {$configSet/@*}
     {$configuration/@*}
     {$usage/@*}
     {attribute usage{local-name($usage)}}
     {attribute configuration {local-name($configuration)}}
     {$configuration/*}
  </lure>
  }
</lures>