Metacat

    /**

     * Query the metacat document store with the given metacat-compatible

     * query document and qformat, and return the result set as a Reader.

     *

     * @param xmlQuery a Reader for accessing the XML version of the query

     * @param qformat the format of return doc. It can be xml, knb, lter and etal.

     * @return a Reader for accessing the result set

     */

    public Reader query(Reader xmlQuery, String qformat) throws MetacatInaccessibleException,

            IOException;