[apps-discuss] draft-pbryan-zyp-json-pointer: name syntax for non-ASCII

Julian Reschke <julian.reschke@gmx.de> Mon, 21 November 2011 14:13 UTC

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Date: Mon, 21 Nov 2011 15:12:54 +0100
From: Julian Reschke <julian.reschke@gmx.de>
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Cc: draft-pbryan-zyp-json-pointer@tools.ietf.org
Subject: [apps-discuss] draft-pbryan-zyp-json-pointer: name syntax for non-ASCII
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Hi there.

In 
<https://tools.ietf.org/html/draft-pbryan-zyp-json-pointer-02#section-3> 
we have:

    A JSON Pointer is a sequence of zero or more reference tokens, each
    prefixed by a "/" (%x2F) character.  Each reference token is a
    sequence of unreserved and/or percent-encoded characters, per
    [RFC3986].

    json-pointer = *( "/" reference-token )
    reference-token = *( unreserved / pct-encoded )

    Characters in reference tokens that are not unreserved SHOULD be
    percent-encoded, per [RFC3986], and MUST be so encoded as "%2F" if
    the character is "/" to avoid being interpreted as a reference token
    prefix.

    It is an error condition if a JSON Pointer does not conform to this
    syntax.

This doesn't seem to consider the case where the reference token 
contains non-ASCII characters, which can happen with JSON.

There seem to be to obvious ways to address this:

(1) Allow non-ASCII characters in the pointer (which would make the 
pointers be more IRI-like, and I think that's consistent with XPath), or

(2) Require UTF-8 encoding.

I believe (1) makes more sense here.

Best regards, Julian