Open-source rule-based pattern matching / information extraction frameworks? [closed]

Answer 1

French academic soft Unitex from University Paris East also matches your description (http://www-igm.univ-mlv.fr/~unitex/)

It's C++ based, comprises many optional preprocessing rules and lexicons for 20+ languages.

The GUI is graph based (you design automata ie 'grammars').

Answer 2

You may also check HTQL. It supports regular expression search of tokens. An example to search for state and zip from US address is:

a=htql.RegEx(); 
a.setNameSet('states', states);
a.reSearchList(address.split(), r"&[ws:states]<,>?<\d{5}>", case=False)