if (rField_is_GF(r))
  {
    Print("//   # ground field : %d\n",rInternalChar(r));
    Print("//   primitive element : %s\n", r->parameter[0]);
    if (r==currRing)
    {
      StringSetS("//   minpoly        : ");
      nfShowMipo();PrintS(StringEndS("\n")); // NOTE/TODO: use StringAppendS("\n"); omFree(s); 
    }
  }
#ifdef HAVE_RINGS
  else if (rField_is_Ring(r))
  {
    PrintS("//   coeff. ring is : ");
    if (rField_is_Ring_Z(r)) PrintS("Integers\n");
    long l = (long)mpz_sizeinbase(r->ringflaga, 10) + 2;
    char* s = (char*) omAlloc(l);
    mpz_get_str(s,10,r->ringflaga);
    if (rField_is_Ring_ModN(r)) Print("Z/%s\n", s);
    if (rField_is_Ring_2toM(r)) Print("Z/2^%lu\n", r->ringflagb);
    if (rField_is_Ring_PtoM(r)) Print("Z/%s^%lu\n", s, r->ringflagb);
    omFreeSize((ADDRESS)s, l);
  }
#endif
  else
  {
    PrintS("//   characteristic : ");
    if ( rField_is_R(r) )             PrintS("0 (real)\n");  /* R */
    else if ( rField_is_long_R(r) )
      Print("0 (real:%d digits, additional %d digits)\n",
             r->float_len,r->float_len2);  /* long R */
    else if ( rField_is_long_C(r) )
      Print("0 (complex:%d digits, additional %d digits)\n",
             r->float_len, r->float_len2);  /* long C */
    else
      Print ("%d\n",rChar(r)); /* Fp(a) */
    if (r->parameter!=NULL)
    {
      Print ("//   %d parameter    : ",rPar(r));
      char **sp=r->parameter;
      int nop=0;
      while (nop<rPar(r))
      {
        PrintS(*sp);
        PrintS(" ");
        sp++; nop++;
      }
      PrintS("\n//   minpoly        : ");
      if ( rField_is_long_C(r) )
      {
        // i^2+1:
        Print("(%s^2+1)\n",r->parameter[0]);
      }
      else if (r->minpoly==NULL)
      {
        PrintS("0\n");
      }
      else if (r==currRing)
      {
        StringSetS(""); nWrite(r->minpoly); PrintS(StringEndS("\n")); // NOTE/TODO: use StringAppendS("\n"); omFree(s); 
      }
      else
      {
        PrintS("...\n");
      }
      if (r->qideal!=NULL)
      {
        if (r==currRing) iiWriteMatrix((matrix)r->qideal,"//   minpolys",1,r,0);
        else PrintS("//   minpolys=...");
        PrintLn();
      }
    }
  }