Question about use of | in a class declaration

[Simon Marlow]

> Here what the User's Guide says:
> 
> > Functional dependencies are implemented as described by 
> Mark Jones in 
> > "Type Classes with Functional Dependencies", Mark P. Jones, 
> In Proceedings 
> > of the 9th European Symposium on Programming, ESOP 2000, 
> Berlin, Germany, 
> > March 2000, Springer-Verlag LNCS 1782.
> > 
> > There should be more documentation, but there isn't (yet). 
> Yell if you need it.
> 
> Folks, let's yell together!
> This is a nice feature. It SHOULD be better known.
> If Simon's team has no time to write it, perhaps it would be 
> nice to put the reference to Mark's paper on line?
> http://www.cse.ogi.edu/~mpj/pubs/fundeps.html

I've put the above link in the docs.

Cheers,
	Simon