[Groff] silly question ...

[Lars Segerlund]

  I have been looking at the output from pic, eqn and friends, and I am a bit 
amiss to
 what 'language' they speak, it's not groff intermidiate language to be fed 
inte gtroff,
 so what is it then ? 

  Also what is the recommended language for a groff preprocessor ?

 I have been oogling the doc's but I am unclear so far, and I thought I would 
ask before
 reading the source.

 / thanks, Lars segerlund.