improve the documentation

README.rst

@@ -35,7 +35,7 @@ Install
 Choose a version of elasticsearch and a DB, then run:
 
 .. code-block:: console
-    
+
     pipenv run pip install -e .[all]
     pipenv run pip install invenio-search[elasticsearch7]
     pipenv run pip install invenio-db[postgresql,versioning]
@@ -51,4 +51,49 @@ Tests
 
 .. code-block:: console
 
-    pipenv run ./run-tests.sh
+    pipenv run ./run-tests.sh
+
+Features
+========
+
+This package serves as a MARC21 datamodel for the repository. Following features
+are already implemented:
+
+  - [ ] create a record
+
+    - [ ] over rest API
+    - [ ] over GUI
+
+  - [ ] modify a record
+
+    - [ ] over rest API
+    - [ ] over GUI
+
+  - [ ] inherit from the global permission system and customize it if necessary
+
+    - [ ] create a curator for marc21 records over the normal interface for it
+    - [ ] inherit ownership of records
+    - [ ] lock records / make read only
+
+  - [ ] landing page
+
+    - [ ] export record as json
+
+  - [ ] search about a record
+
+    - [ ] create a search page only for marc21 records
+    - [ ] make records findable also in the common search (search over all
+      standards used in the repository)
+
+  - [ ] add records to a community
+  - [ ] validate records
+  - [ ] add a DOI
+
+    - [ ] with a special DOI schema (e.g. PREFIX/oer-NUMBER)
+
+  - [ ] provide the records to the OAI-PMH server
+
+
+Examples where this packages is already used:
+
+  - <https://github.com/tu-graz-library/invenio-alma>