RFC Errata
RFC 4627, "The application/json Media Type for JavaScript Object Notation (JSON)", July 2006
Note: This RFC has been obsoleted by RFC 7159
Source of RFC: IETF - NON WORKING GROUPArea Assignment: app
Errata ID: 3159
Status: Rejected
Type: Technical
Publication Format(s) : TEXT
Reported By: James S. Chi
Date Reported: 2012-03-20
Rejected by: Peter Saint-Andre
Date Rejected: 2012-03-22
Section 2.5 says:
string = quotation-mark *char quotation-mark
char = unescaped /
escape (
%x22 / ; " quotation mark U+0022
%x5C / ; \ reverse solidus U+005C
%x2F / ; / solidus U+002F
%x62 / ; b backspace U+0008
%x66 / ; f form feed U+000C
%x6E / ; n line feed U+000A
%x72 / ; r carriage return U+000D
%x74 / ; t tab U+0009
%x75 4HEXDIG ) ; uXXXX U+XXXX
escape = %x5C ; \
quotation-mark = %x22 ; "
unescaped = %x20-21 / %x23-5B / %x5D-10FFFF
It should say:
string = quotation-mark *char quotation-mark
char = unescaped /
escape (
%x22 / ; " quotation mark U+0022
%x5C / ; \ reverse solidus U+005C
%x62 / ; b backspace U+0008
%x66 / ; f form feed U+000C
%x6E / ; n line feed U+000A
%x72 / ; r carriage return U+000D
%x74 / ; t tab U+0009
%x75 4HEXDIG ) ; uXXXX U+XXXX
escape = %x5C ; \
quotation-mark = %x22 ; "
unescaped = %x20-21 / %x23-5B / %x5D-10FFFF
Notes:
There is a contradiction regarding solidus(/, %2F) character - it belongs to both escaped character and unescaped character. To solve this,delete following line:
%x2F / ; / solidus U+002F
The reason it should belong to unescaped character is clear. There's no gain by escape it.
The author has replied as follows:
There is no problem here. There is no requirement that there be a single encoding for each codepoint. "/" and "\/" are both allowed and both produce the same result. The second form was [provided] to allow insertion into HTML, where "</script>" interacts badly, but "<\/script>" does not.
Therefore, this report is rejected.
--VERIFIER NOTES--