CBOR [1] has an extension to allow string references [2], so field names won't take up much space. [1] RFC-7049, also http://cbor.io/ http://cbor.io/ [2] http

CBOR [1] has an extension to allow string references [2], so field names won't take up much space. [1] RFC-7049, also http://cbor.io/ http://cbor.io/ [2] http://cbor.schmorp.de/stringref http://cbor.schmorp.de/stringref It won't make much sense unless you already understand CBOR encoding, but it's a registered extension.