In order to make progress on wording I'd like to have some polls taken for
named unicode escape sequences, since we've learned and changed a few
things since the papers were first written.

1)
In light of progress on D2290 Delimited escape sequences adding the form
\u{ simple-hexadecimal-digit-sequence } to universal-character-name, named
escape sequence should be an alternate form of universal-character-name,
rather than only for literals.

u-char:
    digit
    nondigit

u-char-sequence:
    u-char
    u-char-sequence u-char

universal-character-name:
    add \U{ u-char-sequence }

Add text to say that u-char-sequence must match a name or alias in the UCD.


2)
In light of the implementation experience using the Unicode standard rules
for matching names producing a compact data form with fast lookup, propose
that be adopted rather than mandating CAPITAL only exact match rules.

Note that many online sources of codepoint names are lax about exact match.