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    Attachment C
  
                        FILE FORMATS
  
  This attachment describes the formats for the round results files that will be uploaded to
  the FCC Internet site and FCC Auction Bulletin Board Systems (BBS) after each round of
  the auction.  There are two sets of results files.  These files are in dbf and txt format and
  contain the raw output of the auction data.
  
  The newest round results are uploaded to the Results directory based on the type of file
  format: dbf and txt.
  
  On the primary location, wtbwww01.fcc.gov:
  
          · http://wtbwww01.fcc.gov/MMB/CP2/Auction_27/Results/dbf/
          · http://wtbwww01.fcc.gov/MMB/CP2/Auction_27/Results/txt/
  
       Note: If you cannot access these files at the preceding primary location, you can
       access the same files at either of the following secondary locations:
       wtbwww13.fcc.gov or www.fcc.gov/wtb/auctions/.
       
  After every 50 rounds, files will be moved from the Results directory to archive
  directories.  The following listings show an example of the directory structure for an
  auction in round 102.  Note that the results for rounds 101 and 102 would be in the
  Results directories.
  
  On the primary location, wtbwww01.fcc.gov:
  
  Rounds 1-50           http://wtbwww01.fcc.gov/MMB/CP2/Auction_27/Results/dbf/D001_050
  Rounds 51-100          
  http://wtbwww01.fcc.gov/MMB/CP2/Auction_27/Results/dbf/D051_100
  Rounds 101-102         http://wtbwww01.fcc.gov/MMB/CP2/Auction_27/Results/dbf/
  
  Rounds 1-50          
  http://wtbwww01.fcc.gov/MMB/CP2/Auction_27/Results/txt/T001_050
  Rounds 51-100          
  http://wtbwww01.fcc.gov/MMB/CP2/Auction_27/Results/txt/T051_100
  Rounds 101-102         http://wtbwww01.fcc.gov/MMB/CP2/Auction_27/Results/txt/
  
       Note:  If you cannot access the files at the preceding primary location, you can
       access the same files at either of the following secondary locations:
       wtbwww13.fcc.gov or www.fcc.gov/wtb/auctions/.
  
  
                    Round Results Files
  
  Following are descriptions of the layouts for the dbf versions of the round results files. 
  The txt files will have character field types.
  
  ALL_BIDS file
  mx_group       char(6)
  freq_block          char(2)
  round_num      numeric
  bid_amt        numeric
  bidder_num          numeric
  fcc_acct       char(10)
  date           date
  time           char(8)
  net_bid_amt         numeric
  sort_col_1          numeric
  sort_col_2          numeric
  sub_market          integer
  
  HIGH_BIDS file
  mx_group       char(6)
  freq_block          char(2)
  bid_round      numeric
  bid_amt        numeric
  bidder_num          numeric
  fcc_acct       char(10)
  date           date
  time           char(8)
  net_bid_amt         numeric
  min_accept          numeric
  num_of_bids         numeric
  sort_col_1          numeric
  sort_col_2          numeric
  sub_market          integer
  
  MAXIMUM_ELIGIBILITY file
  round_num      numeric
  bidder_num          numeric
  fcc_acct       char(10)
  max_elig       numeric
  rmng_waivr          numeric
  waivr_ind      char(1)
  rmng_withdrawals    numeric
  required_act        numeric
  current_activity    numeric
  
  WITHDRAWALS file
  mx_group       char(6)
  freq_block          char(2)
  bid_round      numeric
  bid_amt        numeric
  bidder_num          numeric
  fcc_acct       char(10)
  date           date
  time           char(8)
  net_bid_amt         numeric
  sort_col_1          numeric
  sort_col_2          numeric
  sub_market          integer
  
  BIDDER_CROSS_REFERENCE file
  bidder_num          numeric
  fcc_acct       char(10)
  co_name        char(50)
  bidding_credit_pctg numeric