FlexBuffers
So here's how I think this fits into all the other different types of data serialization:Schema-ful, copying:
Protobuf, Thrift, plenty moreSchema-ful, zero-copy: Cap'n'proto, FlatbuffersSchema-less, copying: Json (binary and other variants included), XMLSchema-less, zero-copy: Flexbuffers (Any others? This seems new to me)