text: ANTLR 2 License
  
  We reserve no legal rights to the ANTLR--it is fully in the public domain.
  An individual or company may do whatever they wish with source code distributed
  with ANTLR or the code generated by ANTLR, including the incorporation of
  ANTLR, or its output, into commerical software.
  
  We encourage users to develop software with ANTLR. However, we do ask that
  credit is given to us for developing ANTLR. By "credit", we mean that if you
  use ANTLR or incorporate any source code into one of your programs (commercial
  product, research project, or otherwise) that you acknowledge this fact somewhere
  in the documentation, research report, etc... If you like ANTLR and have developed
  a nice tool with the output, please mention that you developed it using ANTLR.
  In addition, we ask that the headers remain intact in our source code. As
  long as these guidelines are kept, we expect to continue enhancing this system
  and expect to make other tools available as they are completed.
  