datalog-ng spec
datalog-ng spec

spec to support the datalog-ng modifications to congress policy
language. this spec may be broken up into smaller changes
depending on reviewer input.

Implements blueprint datalog-ng

Change-Id: I1fd4d15c02570ade570381b59dcc11c849b27c9d

zhang935602068/congress-specs,ekcs/congress-specs,openstack/congress-specs