# RevisionId

`import { RevisionId } from "destack:runtime";`

Revision identifier in one world lineage.

```ds title="RevisionId"
export newtype RevisionId = uint64
```

[language/library/src/runtime/lineage.ds:11](https://github.com/destack-sh/destack/blob/main/language/library/src/runtime/lineage.ds#L11)