* nusenu:
https://github.com/nusenu/ContactInfo-Information-Sharing-Specification This is an effort that started in 2017 as you can see on github.
In section "Defined fields" you write:
Non-ASCII characters are not supported.
I'm not sure if this applies only to keys or also to values? With the availability of IDN (https://unicode.org/faq/idn.html) in email addresses, supporting only US-ASCII values is too limited.
-Ralph