Hi Don, First of all it looks great – thank you for this. Next to the points already mentioned and discussed I just want to add that we should link to the “good practice guides for Linkification” and “good practice guides for validation of domain name” mentioned on page 2. All best, Lars Von: ua-eai-bounces@icann.org [mailto:ua-eai-bounces@icann.org] Im Auftrag von Tan Tanaka, Dennis Gesendet: Dienstag, 13. Dezember 2016 22:40 An: Don Hollander <don.hollander@icann.org>; ua-eai@icann.org Betreff: Re: [UA-EAI] Quick Guide to EAI Don, Some comments: 1. In the example, under “username” it is suggested that “punycode” (i.e. xn--abc123) is acceptable. IMO, this is wrong. I’m almost sure the protocol doesn’t require this. 2. Same thing for second-level and top-level domains. We should not encourage software to display the A-label to end users. A-label is for the wire. Users should see only the U-label. After all , UA is about processing and displaying domain names in a proper manner. 3. EAI is about Unicode, so not sure why the “ASCII or Unicode” bullet points. This can be interpreted that ASCII-only email addresses are EAI too. 4. Since we are mentioning the idea of an authoritative list of TLDs, we should point the reader where to find one. My two quick cents, Dennis From: <ua-eai-bounces@icann.org<mailto:ua-eai-bounces@icann.org>> on behalf of Don Hollander <don.hollander@icann.org<mailto:don.hollander@icann.org>> Date: Tuesday, December 13, 2016 at 3:48 PM To: "ua-eai@icann.org<mailto:ua-eai@icann.org>" <ua-eai@icann.org<mailto:ua-eai@icann.org>> Subject: [EXTERNAL] [UA-EAI] Quick Guide to EAI Dear all: Here’s the finished (I hope) product – Quick Guide to EAI. Can you please review and provide comments (including endorsement) by the end of this week? Thanks. Don