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| BYTE POS. | NUM BYTES | FIELD FORMAT | DATA TYPE | REF NO. | REQ | DESCRIPTION |
| 1 | 1 | A | CH | R | Format Identifier ( D ) | |
| 2 | 1 | X | CH | R | Format Version ( 2 ) | |
| 3-10 | 8 | XX...XX | CH | R | Herd Code | |
| 11-15 | 5 | XXXXX | CH | 342 | R | STF Unique Animal Number |
| 16-22 | 7 | XX...XX | CH | R | Computer Control Number | |
| 23-30 | 8 | XX...XX | CH | R | Calving Date (yyyymmdd) | |
| 31-32 | 2 | XX | CH | R | Lactation Number | |
| 33-40 | 8 | XX...XX | CH | R | Test Date (yyyymmdd) | |
| 41-43 | 3 | XXX | CH | Temporary String on Test Day | ||
| 44-47 | 4 | XXXX | CH | 8 | R | LTD days in milk - this test day |
| 48-51 | 4 | XXX.X | CH | R | Test Day Milk | |
| 52-54 | 3 | XX.X | CH | R | Test Day % Fat | |
| 55-57 | 3 | XX.X | CH | R | Test Day % Protein | |
| 58-60 | 3 | XX.X | CH | R | Test Day % Casein | |
| 61-63 | 3 | XX.X | CH | R | Test Day % Lactose | |
| 64-66 | 3 | XX.X | CH | R | Test Day % SNF | |
| 67-69 | 3 | XX.X | CH | R | Test Day MUN | |
| 70-71 | 2 | X.X | CH | 75 | R | Test Day Linear Score |
| 72-75 | 4 | XXXX | CH | R | Test Day Raw Count - nearest 1,000 | |
| 76 | 1 | X | CH | 324 | R | Test Day Status Code |
| 77 | 1 | X | CH | 124 | R | Lactation Verification Code |
| 78 | 1 | X | CH | 125 | R | Supervision Code |
| 79-82 | 4 | XXX.X | CH | 116 | R | % of Milk Shipped |
| 83 | 1 | X | CH | R | Milking Frequency on Test Day | |
| 84 | 1 | X | CH | R | Number of Milkings at which Milk was Weighed | |
| 85 | 1 | X | CH | R | Number of Milkings at which Samples were taken | |
| 86-87 | 2 | XX | CH | 103 | R | Number of Milk-Recorded days |