- [ ] decide what property to use for the metadata-provenance url
- [ ] verify existence of property on metadata-only deposits
- [ ] recommend on using it in the documentation
- [ ] extend the deposit receipt to reply with a warning when not using this property (could also be useful for other stuff, like when using deprecated formats/fields like the Slug header instead of `<swh:deposit>`)
- [ ] signal change to HAL
- [ ] test HAL