Converting to/from CBOR

[tarcieri]

CBOR describes a mapping for converting to/from JSON (see RFC7049 section 4). From what I can tell, a conversion of a CBOR document to JSON and back to CBOR would be potentially lossy, as JSON is unable to retain CBOR's tags (described in section 2.4 of RFC 7049)

TJSON could be bidirectionally transcoded from CBOR, but TJSON would be able to preserve more of CBOR's types.