[basex-talk] Query plan via REST interface?

Hi, is it possible to obtain the query plan via the BaseX REST interface? I tried: curl -i -X POST -H "Content-Type: application/xml" -d "<query xmlns=' http://basex.org/rest'><text>some_query_here</text><option name='xmlplan' value='true'/></query>" "http://xyz" but this only returns the query results, not the plan. Thanks, Christian