delimiters between tokens in turtle

I can't quite work out what the delimiters between tokens are.

The following seems to be correct N3 (cwm parses it)

  @prefix : <>.
  :me</knows>:her,:him.

cwm even is able to parse

   @prefix foaf: <http://xmlns.com/foaf/0.1> .
   :me foaf:knows:her.

Anyway, it's not so easy to implement some of this. 
For some context, I have been working on this in Scala, and writing up
some thoughts here:

   https://bitbucket.org/pchiusano/nomo/issue/6/complex-ebnf-rules

Henry

Social Web Architect
http://bblfish.net/