SeqNum fields are similar to ints, but with the additional semantics that they reference a particular message sequence number. They are most often used in error workflows, when there's the need to reference an erroneous message.
A SeqNum is a positive integer. It is encoded identically to an int field.
| Example | Valid | Notes |
|---|---|---|
| 23 | ||
| 00023 | Leading zeroes are permitted | |
| 0 | Must be positive | |
| 10a | 'a' is not a valid digit |