From memory msgpack is semantically very similar to JSON. It unpacks into arrays and strings and hash tables in more or less the same way, though I think hash t

From memory msgpack is semantically very similar to JSON. It unpacks into arrays and strings and hash tables in more or less the same way, though I think hash table keys are more flexible. It does not come with a schema for object structure or anything, the unpack routines are generic (and pretty "branchy" as a result.)