On 3/1/2021 9:20 AM, Barry Leiba wrote:
(1) Add a paragraph about emoji sequences (specifically, things that
This has been added to the end of Section 2:
Note:
The "emoji" token looks simple. It isn't. Implementors are
well-advised not to assume that emoji sequences are trivial to parse or
validate. Among other concerns, an implementation of the Unicode
Character Database is required. An emoji is more than a stand-in for a
simple alternation of characters. Similarly, one emoji sequence is not
interchangeable with, or equivalent to, another one, and comparisons
require detailed understanding of the relevant Unicode mechanisms. Use
of an existing Unicode implementation will typically prove extremely
helpful, as will an understanding of the error modes that may arise from
a chosen implementation.
d/
--
Dave Crocker
Brandenburg InternetWorking
bbiw.net
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