"name": <id> required
"version": <version> required
+ "cksum": <string> optional
"tables": {<id>: <table-schema>, ...} required
The "name" identifies the database as a whole. It must be
present. Open vSwitch semantics for "version" are described in
ovs-vswitchd.conf.db(5).
+ The "cksum" optionally reports an implementation-defined checksum
+ for the database schema.
+
<table-schema>
A JSON object with the following members: