Graphical Grammar Studio

Graphical Grammar Studio was developed as an Open Source Java-based instrument that can be used for natural language processing tasks.

The software includes a visual grammar editor and a library for applying / matching grammars on input text.

Grammars can be used to find and annotate sequences of words which respect certain conditions. It can be used for creating basic NLP tools like phrase chunkers, named entity finders, pronoun coreference solvers, etc.

A grammar is represented by a state machine which can be visualised with the editor. Each node in the grammar specifies the conditions for which a token in the input can be matched.

Users can edit, create and link such nodes. Also, it is permited to enforce priorities or recursion limits on the nodes / states in the grammar.

A grammar is saved under the XML format and can be loaded, compiled and applied on input text using the included Java library.