[Cbor] [Technical Errata Reported] RFC8610 (6527)

RFC Errata System <rfc-editor@rfc-editor.org> Sun, 11 April 2021 16:11 UTC

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Subject: [Cbor] [Technical Errata Reported] RFC8610 (6527)
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The following errata report has been submitted for RFC8610,
"Concise Data Definition Language (CDDL): A Notational Convention to Express Concise Binary Object Representation (CBOR) and JSON Data Structures".

You may review the report below and at:

Type: Technical
Reported by: Sean Bartell <smbarte2@illinois.edu>

Section: B

Original Text
     SESC = "\" (%x20-7E / %x80-10FFFD)

Corrected Text
     SESC = "\" (%x22 / %x27 / %x2F / %x5C / %x62 / %x66 / %x6E / %x72 / %x74 / %x75 4HEXDIG )

The ABNF rule for string escape codes should specify which escape codes are allowed, and also specify that "\u" must be followed by four hex digits. My suggested correction is based on JSON, but with the addition of "\'" (single quote) for use in text-based byte strings (section G.2). (Presumably, characters outside the BMP must be escaped using a surrogate pair, as in JSON.)

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RFC8610 (draft-ietf-cbor-cddl-08)
Title               : Concise Data Definition Language (CDDL): A Notational Convention to Express Concise Binary Object Representation (CBOR) and JSON Data Structures
Publication Date    : June 2019
Author(s)           : H. Birkholz, C. Vigano, C. Bormann
Category            : PROPOSED STANDARD
Source              : Concise Binary Object Representation Maintenance and Extensions
Area                : Applications and Real-Time
Stream              : IETF
Verifying Party     : IESG