Build #28 (Mar 31, 2022 7:44:59 PM)

1. Update README.md (detail)
2. update MEC030 to v2.2.1 (detail)
3. separate data models for nested objects (detail)
4. rename custom data models (detail)
5. change enum type to integer where applicable (detail)
6. update specs version to 2.1.9 as per latest draft (detail)

Started by GitLab push by Walter Featherstone

• origin/master