README.md in y_nelson-2.0.6 vs README.md in y_nelson-2.0.7

@@ -9,12 +9,12 @@
 `YNelson` provides a _domain_ _specific_ _language_ (DSL), that can be loaded by:
 ```ruby
   require 'y_nelson'
   include YNelson
 ```
-`YNelson` DSL includes aspects of `YPetri`. It means, that it has the same
-abilities as `YPetri`. See `YPetri` gem
+`YNelson` DSL includes aspects of `YPetri`. It means, that it has compatible
+interface with `YPetri` DSL. See `YPetri` gem
 [for Petri net aspect usage examples](https://github.com/boris-s/y_petri).
 
 ## Zz structure aspect
 
 `YNelson` places and transtitions are both objects (or "cells", using Ted
@@ -23,10 +23,10 @@
 dimension. Zz structure aspect in general is defined in
 [yzz gem](https://github.com/boris-s/y_petri). In addition to this, `YNelson`
 automatically creates Zz connections in parallel to arcs of a Petri net. This
 way, places and transtions of a Petri net, whose relations are normally captured
 by arcs, can also have other relations defined, captured by Zz dimensions. Zz
-structure aspect is still in alpha stage at present.
+structure aspect is still under development.
 
 ## Contributing
 
 1. Fork it
 2. Create your feature branch (`git checkout -b my-new-feature`)