| Composite data element specification | C128 |
| Directory | Messages | Segments | Composites | Data elements | Codes | Meaning of the change indicators |
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| Rate per unit and rate basis. |
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| 010 | 5419 | Rate type code qualifier | M | 1 | an..3 | ||
| 020 | 5420 | Unit price basis rate | M | 1 | n..15 | ||
| 030 | 5284 | Unit price basis quantity | C | 1 | n..9 | ||
| 040 | 6411 | Measurement unit code | C | 1 | an..8 | ||
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