First, it's great to see these extensions being created!

Some feedback:

1. Literal fields (strings, integers, etc.) that are optional should allow a "null" type, to allow publishers to remove values according to the OCDS merging rules.
2. Many fields are missing a "title" JSON Schema metadata property.
3. The Qualification id field should be required, to support the identifier merge rule.
4. The Qualification status field should have a codelist CSV file that corresponds to the enum, and it should refer to the file using the "codelist" property. It should also set "openCodelist": false, since the enum means other codes are disallowed. Lastly, null should be added to the enum, if the first change above is made.