Wanting to use some of AWK's grammar rules - is it legal?

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jade goat

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Mar 7, 2018, 12:13:27 AM3/7/18
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Hi all -  I'm a first-timer here and having a lot of fun poking around with ANTLR4! 

 I have a question.  I'm wanting to do a small public-domain "toy AWK" using ANTLR.  To do this, I'd like to use a few of AWK's grammar rules (as shown on the Open Group's website).  However, I noticed a copyright there. 

 I'm puzzled.  There are a number of existing *real* AWKs, all with their own licenses.  They must surely have used some of the AWK grammar that is on the Open Group's site.  So - I'm keen to hear what people think.  Is it likely to be legal to use some of those grammar rules in my "toy AWK"? 

 ( I have emailed the Open Group asking about this but I have not yet had a reply. ) 

 Looking forward to hearing from you!  Bye for now - 
 - Andy  ( jade goat )  
 
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