| Directory | Messages | Segments | Composites | Data elements | Codes | Meaning of the change indicators |
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| To identify a language. |
| 覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧覧 |
| 010 | 3453 | Language name code | C | 1 | an..3 | ||
| 020 | 3452 | Language name | C | 1 | an..35 | ||
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