| Composite data element specification | C270 |
| Directory | Messages | Segments | Composites | Data elements | Codes | Meaning of the change indicators |
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| Control total for checking integrity of a message or part of a message. |
| 覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧 |
| 010 | 6069 | Control total type code qualifier | M | 1 | an..3 | ||
| 020 | 6066 | Control total value | M | 1 | n..18 | ||
| 030 | 6411 | Measurement unit code | C | 1 | an..3 | ||
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