RFC 8259, "The JavaScript Object Notation (JSON) Data Interchange Format", December 2017

Errata ID: 7673
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Zachary Collier (Zamicol)
Date Reported: 2023-10-11

Section 7 says:

The representation of strings is similar to conventions used in the C family
of programming languages.  A string begins and ends with quotation marks. All
Unicode characters may be placed within the quotation marks, except for the
characters that MUST be escaped: quotation mark, reverse solidus, and the
control characters (U+0000 through U+001F).

It should say:

The representation of strings is similar to conventions used in the C family
of programming languages.  A string begins and ends with quotation marks.  All
Unicode characters may be placed within the quotation marks, except for the
characters that MUST be escaped: quotation mark, reverse solidus, and the
control characters (U+0000 through U+001F, U+007F, and U+0080 through
U+009F).

Notes:

There are 33 7-bit control characters, but the JSON RFC only listed 32 by
omitting the inclusion of the last control character in the 7-bit ASCII range,
'del.' However, JSON is not limited to 7-bit ASCII; it is Unicode. Unicode
encompasses 65 control characters from U+0080 to U+009F, totaling an additional
32 characters. The section that currently reads "U+0000 through U+001F" should
include these additional control characters reading as "U+0000 through U+001F,
U+007F, and U+0080 through U+009F"

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