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What is new in the December 2017 RFC 8259 specification of JSON?

Tags:

json

The JSON interchange format established in ECMA 404 and RFC 4627/RFC 7158/ RFC 7159.

But in December 2017, RFC 8259 and ECMA 404 version 2 were both released.

What changed in the new version?

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William Entriken Avatar asked Jan 26 '26 12:01

William Entriken


1 Answers

Most significant change is that UTF-8 encoding is a MUST for open systems.

More details see in Tim Bray's blog post.

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Andriy Plokhotnyuk Avatar answered Jan 29 '26 03:01

Andriy Plokhotnyuk