Update README.md

Author: george0st

README.md

@@ -45,7 +45,14 @@ the definition `/spec/targets/` for project in JSON files:
  - ✅ Parquet, ✅ CSV
 
 ## Meta-Model
+
+The object relations contain relations between key objects in meta-model, plus
+splitting these objects in packages (01-model, 02-data, etc.)
 ![Object-relations](./00-high-level/object-relations.png)
+
+The basic feasture sets contains view to basic feature sets and relations between them.
 ![Basic-model](./00-high-level/basic-feature-sets.png)
-![Derived-model](./00-high-level/derived-feature-sets.png)
 
+The derived feasture sets contains view to derived feature sets and relations
+between them.
+![Derived-model](./00-high-level/derived-feature-sets.png)