[osis-core] paren

[Troy A. Griffitts]

> What is the purpose of a <paren> element?
> 
> It doesn't seem that there is any significance to passages that would be 
> marked with them other than the fact that they are inside parentheses 
> (which seem like adequate "markup" to me).  Is there some reason for 
> which they would need to be accessed specifically or rendered or 
> otherwise treated differently from other text?

Not sure, probably the same so, as with other tags like salutation, etc. 
  Maybe someone would wish to render this differently.  Dunno.  Anyone 
else have thoughts.  I just came across some () in text and though we 
should tag them with something besides '()'.