Lao IDN Table
Table Information:
| Table ID: |
|
lo |
| Table Type: |
|
Language |
| Version: |
|
3.0 |
| Date Introduced: |
|
2020-03-18 |
Domain Extensions which support this table:
This IDN table is enabled for the following domain extensions:
Policy Statement:
This IDN table is derived from the Root Zone Label Generation Rules for
Lao
which may be found at the following URL:
https://www.icann.org/sites/default/files/lgr/lgr-2-lao-script-26jul17-en.html
Repertoire
In addition to the code points listed below, the sequence 0EB2 0EB0 has
been
defined to facilitate implementation of WLE rule follows-vafter-context as
a
context rule.
As this table is designed to validate registrations at the second-level,
the
repertoire includes Lao digits (U+0ED0-U+0ED9), ASCII digits
(U+0030-U+0039),
and HYPHEN-MINUS (U+002D).
Variants
This LGR defines no variants.
Character Classes
Tag Members
Cf* {0E81 0E87 0E8A 0E8D 0E94 0E97 0E99-0E9A 0E9F 0EA1 0EA3
0EA5
0EA7 0EAA}
consonant {0E81-0E82 0E84 0E87-0E88 0E8A 0E8D 0E94-0E97 0E99-0E9F
0EA1-0EA3 0EA5 0EA7 0EAA-0EAB 0EAD-0EAE}
semi-consonant {0EBC}
tone-mark {0EC8-0ECB}
vowel-above {0EB1 0EB4-0EB7 0EBB 0ECD}
vowel-below {0EB8-0EB9}
vowel-after {0EB0 0EB2 0EBD}
vowel-before {0EC0-0EC4}
sign {0EC6 0ECC}
* The "Cf" tag denotes final consonants. Other character classes
that have
been used are semi-consonant, tone-mark, vowel-above, vowel-before,
vowel-below and vowel-after.
Contextual Rules
* leading-combining-mark - Default rule from matching labels with leading
combining marks.
* follows-consonant - A semi-consonant must follow a consonant.
* precedes-consonant - A vowel-before precedes a main consonant cluster.
* follows-main-consonant - A vowel-above, and vowel-below follow a main
consonant C.
* follows-C-tonemark-vabove - A vowel-after follows a main consonant,
tone-mark or vowel-above.
* follows-vbefore-consonant-cluster - The sequence (0EB2 0EB0) follows a
vowel
before, and a consonant cluster
* follows-C-vabove-vbelow - A tone-mark follows a main consonant,
vowel-above
or vowel-below.
* follows-Cf - The sign 0ECC can only occur after final consonants.
* repetition-mark-limit - The sign 0EC6 can only occur 0 to 3 times at the
end
of the label.
No context rules apply to "consonant" code points.
A label containing ASCII digits (U+0ED0-U+0ED9) cannot also contain Lao
digits
(U+0030-U+0039).
A Unicode string MUST NOT contain "--" (two consecutive hyphens)
in the third- and fourth-character positions and MUST NOT start or end with
a "-" (hyphen). See RFC5891, Section 4.2.3.1.
Character Table:
Download lo-3.0.txt