XEP-0347 references an external resource

[linuxwolf]

XEP-0347 references an image hosted outside of xmpp.org.

It is undesirable for XEPs to include references outside of the XEP change control process. Some allowances might be necessary, but such exceptional references also must be clearly marked as non-normative and outside the change control process.

[intosi]

I would say it's not only undesirable, it's outright wrong. The images are part of the spec.

[PeterWaher]

Are you referring to the reference to the Google chart API to generate a QR-code?

[winfried]

Correct

On March 18, 2016 6:16:07 PM CET, Peter Waher notifications@github.com wrote:

Are you referring to the reference to the Google chart API to generate
a QR-code?

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#62 (comment)

Normally there is some text here bragging about the new mobile phone and excusing for the brevity. That is insane. If this phone was really that great, I would have sent a decent mail.

[PeterWaher]

Ok. Is it the textual Google API reference that is the problem (in the example), or is it the image tag, linking to the API to generate a QR code? (It's only an example of how a QR code can be created). If it's the latter, I can replace the image with an embedded image using the data URI scheme.

[SamWhited]

@PeterWaher This is mostly the image itself (there should be no external resources loaded from any XEPs; what if Google sunsets the charts API? The XEP would be broken, and we don't want that), but I'd say that it's preferable not to make recommendations in general about libraries or software to use. That's an implementation detail, so having "you can use Google Charts to make QR codes" is unnecessary.