This document specifies a reference set of Label Generation Rules for Montenegrin in the Cyrillic script using a language-specific repertoire for the second level domain or domains identified above. The format of this file follows [RFC 7940]. This LGR is adapted from the “Reference LGR for the Second Level for the Montenegrin (Cyrillic) Language” [Ref-LGR-cnr-Cyrl], for details, see Change History below.
Standalone LGR: This LGR is designed to be used in a zone that does not cater to IDNs other than those valid under this LGR. This LGR lacks features that would allow its use in the context of another LGR in the same zone, and it may contain other features incompatible with such use.
All references converge on 30 Cyrillic code points (23 + 7 as defined by RFC 5992 [130]), identical to the Serbian set. There has been a recent addition of two letters unique to Montenegrin replacing the digraphs zj and sj. They are encoded as combining sequences: each is expressed by a consonant (U+0437 CYRILLIC SMALL LETTER ZE or U+0441 CYRILLIC SMALL LETTER ES), followed by U+0301 COMBINING ACUTE ACCENT. There is no need to include the combining mark separately in the repertoire.
As of 25 October 2024, there is no IDN table published in the IANA Repository of IDN Practices by a .me (Montenegro cctld).
The CLDR auxiliary set includes all code points to support Russian, but this is not supported by other sources, even for an extended set. In addition, there is some use of 6 vowels with double grave and inverted breve in Serbian phonology and poetics which would likely be shared with Montenegrin, but this use is not germane for IDNs.
Letters documented in some references but not included:
U+0301 COMBINING ACUTE ACCENT
U+0449 CYRILLIC SMALL LETTER SHCHA
U+044A CYRILLIC SMALL LETTER HARD SIGN
U+044B CYRILLIC SMALL LETTER YERU
U+044C CYRILLIC SMALL LETTER SOFT SIGN
U+044D CYRILLIC SMALL LETTER E
U+044E CYRILLIC SMALL LETTER YU
U+044F CYRILLIC SMALL LETTER YA
U+0451 CYRILLIC SMALL LETTER IO
U+0430 U+030F CYRILLIC SMALL LETTER A WITH DOUBLE GRAVE ACCENT
U+0430 U+0311 CYRILLIC SMALL LETTER A WITH INVERTED BREVE
U+0435 U+030F CYRILLIC SMALL LETTER IE WITH DOUBLE GRAVE ACCENT
U+0435 U+0311 CYRILLIC SMALL LETTER IE WITH INVERTED BREVE
U+0438 U+030F CYRILLIC SMALL LETTER I WITH DOUBLE GRAVE ACCENT
U+0438 U+0311 CYRILLIC SMALL LETTER I WITH INVERTED BREVE
U+043E U+030F CYRILLIC SMALL LETTER O WITH DOUBLE GRAVE ACCENT
U+043E U+0311 CYRILLIC SMALL LETTER O WITH INVERTED BREVE
U+0440 U+030F CYRILLIC SMALL LETTER ER WITH DOUBLE GRAVE ACCENT
U+0440 U+0311 CYRILLIC SMALL LETTER ER WITH INVERTED BREVE
U+0443 U+030F CYRILLIC SMALL LETTER U WITH DOUBLE GRAVE ACCENT
U+0443 U+0311 CYRILLIC SMALL LETTER U WITH INVERTED BREVE
None.
There are no variants defined between Cyrillic letters.
No ASCII Variants: Note that this LGR does not contain definitions for “blocked” variants for letters that look indistinguishable from ASCII letters (homoglyphs). If concurrent use of LDH labels is desired, the resulting conflicts can be handled by using the “Common LGR” in processing. For details, see Section 3, “Use of Multiple Reference LGRs in the Same Zone” in [Level-2-Overview].
This LGR does not define named character classes.
By default, the LGR includes the rules and actions to implement the following restrictions mandated by the IDNA protocol. They are marked with ⍟.
This LGR includes the default actions for LGRs as well as the action needed to invalidate labels with misplaced combining marks. They are marked with ⍟. For a description see [RFC 7940].
Variant-related actions included to facilitate integration as appropriate.
The LGR in this document has been adapted from the corresponding Reference LGR for the Second Level. The Second Level Reference LGR for the Montenegrin (Cyrillic) Language was developed by Michel Suignard and Asmus Freytag, including input by Michael Everson, Nicholas Ostler, and Wil Tan, and based on multiple open public consultations.
Language tag has been updated.
Unicode Version has been updated.
Adopted from the Second Level Reference LGR for the Montenegrin (Cyrillic) Language [Ref-LGR-cnr-Cyrl] without normative changes.
General reference for the language:
Other references cited in this document:
In the listing of the repertoire by code point, references starting from [0] refer to the version of the Unicode Standard in which the corresponding code point was initially encoded. Other references (starting from [100]) document usage of code points. Entries in the table may have multiple source reference values. In the listing of whole label evaluation and context rules, reference [150] indicates the source for common rules. For more details, see the Table of References below.
]]>