structure {<structure-statement>} end

<structure-statement> :==

  data_cns_mtf {<mtf-record>}
  --{Read mtf records from file. Information from multiple files will
     be appended.}
  reset
  --{Reset molecular topology database.}
  ?
  --{Print information about current status.}

  --{<mtf-record> contains molecular structure information in STAR format.
     <mtf-record>s are written by the write structure command. They are not
     stored in the rotating command buffer during a loop execution.}