Specify bindings for path variables in graph patterns

[vgapeyev]

In the current state of RFC-0033 it was not specified (see "Unresolved Questions" section) what values get bound to path variables in the result of a pattern match.
Example: path variable p in

(graph MATCH p = (s)−[:Transfer]−>(s1)−[:Transfer]−>(s2)−[:Transfer]−>(s))

Addressing this will involve researching the current state of GPML and related specifications and other graph query tools on the market.

The most natural delivery would be an update to RFC-0033, or a separate RFC if that is not possible.