Query: parser generators, trade mags

[hays@linc.cis.upenn.edu (Ellen Hays)]

I'm not a reader of this group, so I apologize if these questions
have been asked/discussed recently here.  I'm posting this for a 
friend who needs to know:
1) whether Ada versions of things like LEX and YACC exist (the parser
   generator is most important, I think), and if so, who makes them?
2) whether there is a trade publication devoted to Ada, and if so,
   name(s) and address(es) of same.

Again, I don't read this group, so e-mail replies to me, please.  
Thanks in advance for any help in these matters.

Ellen Hays
hays@linc.cis.upenn.edu