[antlr-interest] More than 1 grammar

[manas]

hello sir,
   
  I am a final year computer engineering student. I want to know if we could declare more than one grammar for the same tool. Like i declare one grammar for Arithmetic operations, another for Logical operations, and say one for unary operations. 
  Is this possible to declare more than one grammar files and then use them as one.
   
  reply soon ,
  waiting in anticipation
  Manas

       
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