rssd_q.html is a HTML file within leaf RSS file, rssd_opq.rdf. 
rssd_root.rdf (1st level directory)
  + rssd_abc.rdf (2nd level directory)
  |   + rssd_a.rdf (Leaf RSS file)
  |   + rssd_b.rdf
  |   + rssd_c.rdf
  + rssd_hij.rdf (2nd level directory)
  |   + rssd_h.rdf (Leaf RSS file)
  |   + rssd_i.rdf
  |   + rssd_j.rdf
  + rssd_opq.rdf (Leaf RSS file)
      + rssd_o.html
      + rssd_p.html
      + rssd_q.html