Thu Apr 30 19:36:54 MET DST 1998 hannes:
  added type resolution (types.doc)
Tue Apr 28 20:12:03 MET DST 1998 hannes:
  changed Rings and Ordering/Available rings (general.doc)
Mon Apr 27 18:35:25 MET DST 1998 hannes: 
  added map and sub-sections to types.doc
  removed dring