For the cost saving of one byte we are essentially introduction options here. I am wondering whether this byte is worth it.
-----Original Message----- From: Mike Jones [mailto:[email protected]] Sent: 19 October 2017 21:29 To: Carsten Bormann; Jim Schaad Cc: Hannes Tschofenig; [email protected] Subject: RE: [Ace] draft-ietf-ace-cbor-web-token-08 - CWT CBOR Tag I also agree that the spec already has this right. Typically no tag will be needed because the application knows the data structure is a CWT from context. The tag is available for any use cases where it's needed to resolve ambiguity that might otherwise be present. -- Mike -----Original Message----- From: Ace [mailto:[email protected]] On Behalf Of Carsten Bormann Sent: Thursday, October 19, 2017 10:05 AM To: Jim Schaad <[email protected]> Cc: Hannes Tschofenig <[email protected]>; [email protected] Subject: Re: [Ace] draft-ietf-ace-cbor-web-token-08 - CWT CBOR Tag On Oct 19, 2017, at 18:41, Jim Schaad <[email protected]> wrote: > > • I already know that this is going to be a CWT so I save a byte. > • I don’t know so I waste a tag byte in that case. Right. In REST protocols, we usually have a media type, so we don’t need the CBOR Tag. Within some other data structures, or in legacy protocols such as MQTT, we may not have that, so a tag is a good single standard way to indicate this. (Does the latter case need to be a single byte [which is then preceded by 0xd8, by the way]? Maybe that would not have been necessary(*), but then CWTs are going to be rather common. And 61 is a “=“, which is cool for our hexdump reading population :-) Grüße, Carsten (*) The number is already assigned, BTW. _______________________________________________ Ace mailing list [email protected] https://www.ietf.org/mailman/listinfo/ace IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. _______________________________________________ Ace mailing list [email protected] https://www.ietf.org/mailman/listinfo/ace
