This is the directory to store design documents which may include draft versions of blueprints written before proposing to upstream OSS communities such as OpenStack, in order to keep the original blueprint as reviewed in OPNFV. That means there could be out-dated blueprints as result of further refinements in the upstream OSS community. So please refer to the link in each document to find the latest version of the blueprint and status of development in the relevant OSS community. See also https://wiki.opnfv.org/requirements_projects .