Draft response for comment N3-1

Draft response for comment N3-1

http://www.w3.org/2009/sparql/wiki/CommentResponse:N3-1

Sandro - there is the specific issue of expressions.  As property paths 
already use * and + for their natural regex meaning, expressions might 
well need to be delimited anyway.  It is a balance of what is the best 
use of the undelimited form and delimited forms in the overall syntax, 
together with design style and parser complexity.

We could add something like:
"""
In N3Alternatives#Syntax there is discussion of including expressions in 
N3.  Property paths already use * and + for their regex meanings. 
Adding expressions as well overloads several characters so possibly 
requiring syntax to delimit an expression.
"""

	Andy