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Document: draft-ietf-json-rfc4627bis-09.txt
Reviewer: Elwyn Davies
Review Date: 17 December 2013
IETF LC End Date: 25 November 2013
IESG Telechat date: 19 December 2013
Summary:
Almost ready for publication as a standard track RFC. Several of the
issues identified in the last call/previous telechat review have been
addressed but the authors have noted that the document update was agreed
on the basis that it would make minimal changes. However, at least the
first of the 'minor issues' called out represents undocumented
functionality that could result in non-interoperable implemenattions if
the unordered requirement is not honoured. The second is an
inconsistency and the third is a judgment call.
There are a couple of recommendations that I think would assist
readability and reflect usual practice with such documents.
Major issues:
None.
Minor issues:
s4: The unordered nature of the entries in an object is not mentioned.
Presumably it should state that two objects with the same sets of
name-value pairs ("members") in any order are logically equivalent.
s10: s9 allows there to be parsers that accept extensions. s10 only
allows generators to produce strict JSON. Perhaps one should allow for
strict generators and extended generators that match with extended parsers?
s12:
Since JSON text may potentially be parsed (effectively compiled) into what
looks like a piece of executable binary, it is vital that parsers don't
suffer from buffer overruns etc. This should probably be called out.
Nits/editorial comments:
General: Many RFCs that use ABNF specifications where parts of the ABNF
are presented in separate sections also provide a section or appendix
with the whole of the ABNF in one place. Whilst this provides a very
minor double maintenance problem, it does aid implementers and
facilitates checking of the complete grammar to catch mismatches.
s6: To be absolutely definite, assert that numbers are represented in
base 10.
s13: Might be useful to insert examples with
- an array with elements that are not the same type
- equivalent objects with the members in different orders.
These could also show off escape sequences and maximally compact formats
(using the equivalent object example to show that the white space is
irrelevant).
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