First, thanks for mentioning our product!

Regarding your interrogations, most of the additional features of NuGram IDE Professional Edition are already documented. Just go to http://nugram.nuecho.com/html_app/doc/grammar_ide and look for “(Professional Edition only)”. Andas we are in the process of enhancing the NuGram Platform website, we will soon provide a feature comparison matrix.

In short, the professional edition will add (1) tools for supporting large projects, (2) an enhanced sentence generation tool, and (3) support for generating and testing dynamic grammars developed in a more “JSP-like” way. Note that this edition will also include a license of NuGram Server, which will have a much simpler interface than the JSON-based one, thus easing the integration of dynamic grammars in applications developed with tools like VO. Stay tuned!