| Qualifier | number |
| Definition | a number to indicate the order of genetic elements (e.g., exons or introns) in the 5' to 3' direction |
| Value Format | unquoted text (single token) |
| Example | /number=4 /number=6B |
| Comment | text limited to integers, letters or combination of integers and/or letters represented as an unquoted single token (e.g. 5a, XIIb); any additional terms should be included in /standard_name. Example: /number=2A /standard_name="long" |