entities.md in power_stencil-0.4.4

- old
+ new

@@ -667,10 +667,12 @@
 ```
 So you see that if we try to set parent with something wrong, the accessor seems to accept, you can even see the `#fields` Hash updated. But as soon as you try to save to entity, or if you use the `#valid?` method, it complains about the type... Cool.
 
 :information_source: The `name` property of the `has_one` directive is optional. If not present the field will be named from the entity_type referenced instead...
 
+**:warning: See more advanced features, like reverse methods in the [universe_compiler advanced relations documentation].**
+
 ### has_many
 
 Once you know the `has_one` directive, you should not be surprised by the `has_many` directive...
 
 ```ruby
@@ -715,10 +717,12 @@
   name: prop2
 :name: test_entity
 ```
 Nice !
 
+**:warning: See more advanced features, like reverse methods in the [universe_compiler advanced relations documentation].**
+
 ### is_array
 
 You can define a field as being an array:
 
 ```ruby
@@ -967,6 +971,7 @@
 [Ruby]: https://www.ruby-lang.org "The powerful Ruby language"
 [Pry]: https://github.com/pry/pry "The awesome Pry console"
 [ActiveRecord]: https://guides.rubyonrails.org/active_record_basics.html "The ultimate ORM"
 [Ruby On Rails]: https://rubyonrails.org/ "One of the best Web framework"
 [universe_compiler]: https://gitlab.com/tools4devops/universe_compiler "The underlying engine to manage entities and compilation !"
+[universe_compiler advanced relations documentation]: https://gitlab.com/tools4devops/universe_compiler#advanced-relations "Advanced relational features"
 [Graphviz]: (https://www.graphviz.org/) "Graph Visualization Software"
\ No newline at end of file