Reference LGR for script: Georgian (Geor) lgr-second-level-georgian-script-24aug20-en

This document is mechanically formatted from the above XML file for the LGR. It provides additional summary data and explanatory text. The XML file remains the sole normative specification of the LGR.

Date 2020-08-24
LGR Version 3
Language und-Geor
Unicode Version 6.3.0

Table of Contents

1 Description

Reference Label Generation Rules for the Georgian Script

Overview

This document specifies a reference set of Label Generation Rules for Georgian Mkhedruli (modern) for the second level. The starting point for the development of this LGR can be found in the related Root Zone LGR [RZ-LGR-3-Geor]. For details and additional background on the script, see "Proposal for a Georgian Script Root Zone LGR [Proposal-Georgian]". The format of this file follows [RFC 7940].

This is a DRAFT document released for public comments and not final. Please see the announcement on the ICANN website for public comments on the Second Level Reference LGRs for details on how to submit comments.

Repertoire

The repertoire contains 33 code points for letters used by languages that are actively written in the Mkhedruli alphabet. The repertoire is a subset of [Unicode 6.3]. For details, see Section 5, "Repertoire" in [Proposal-Georgian]. (The proposal cited has been adopted for the Georgian script portion of the Root Zone LGR.)

For the second level, the repertoire has been augmented with the ASCII digits, U+0030 (0) to U+0039 (9), and U+002D (-) HYPHEN-MINUS for a total of 44 repertoire elements.

Each code point or range is tagged with the script or scripts that the code point is used with, and one or more references documenting sufficient justification for inclusion in the repertoire, see "References" below.

Variants

According to Section 6, "Variants" in [Proposal-Georgian], this LGR defines no variants.

Character Classes

This LGR does not define character classes.

Whole Label Evaluation (WLE) and Context Rules

Common Rules

Default Actions

Actions include the default actions for LGRs as well as that needed to invalidate labels with misplaced combining marks. They are marked with ⍟. For a description see [RFC 7940].

Georgian-specific Rules

According to Section 7, "Whole Label Evaluation (WLE) Rules" in [Proposal-Georgian], this LGR does not define rules specific to Georgian.

Methodology and Contributors

This reference LGR for Georgian Mkhedruli for the 2nd Level has been developed by Michel Suignard and Asmus Freytag, based on the Root Zone LGR for Georgian Mkhedruli and information contained or referenced therein, see [RZ-LGR-3-Geor]. Suitable extensions for the second level have been applied according to the [Guidelines]. The original proposal for a Root Zone LGR for Georgian Mkhedruli, that this LGR is based on, was developed by the Georgian Generation Panel. For more information on methodology and contributors to the underlying Root Zone LGR, see Sections 4 and 8 in [Proposal-Georgian], as well as [RZ-LGR-Overview].

References

The following general references are cited in this document:

[Guidelines]
ICANN, "Guidelines for Developing Reference LGRs for the Second Level, (Los Angeles, California: ICANN, 27 May 2020),
https://www.icann.org/en/system/files/files/lgr-guidelines-second-level-06jan16-en.pdf
[Proposal-Georgian]
Proposal for the Georgian Script Root Zone LGR, 14 November 2016,
https://www.icann.org/en/system/files/files/proposal-georgian-lgr-24nov16-en.pdf
[RFC 7940]
Davies, K. and A. Freytag, "Representing Label Generation Rulesets Using XML", RFC 7940, August 2016,
http://www.rfc-editor.org/info/rfc7940
[RZ-LGR-Overview]
Integration Panel, "Root Zone Label Generation Rules - LGR-3: Overview and Summary", 01 March 2020 (PDF),
https://www.icann.org/sites/default/files/lgr/lgr-3-overview-10jul19-en.pdf
[RZ-LGR-3-Geor]
ICANN, Root Zone Label Generation Rules for the Georgian Script (und-Geor) , 10 July 2019 (XML)
https://www.icann.org/sites/default/files/lgr/lgr-3-georgian-script-10jul19-en.xml
[Unicode 6.3]
The Unicode Consortium. The Unicode Standard, Version 6.3.0, (Mountain View, CA: The Unicode Consortium, 2013. ISBN 978-1-936213-08-5)
http://www.unicode.org/versions/Unicode6.3.0/

For references consulted particularly in designing the repertoire for the Georgian script for the second level. please see details in the Table of References below. Reference [0] refers to the Unicode Standard version in which corresponding code points were initially encoded. Reference [100] corresponds to a source given in [Proposal-Georgian] for justifying the inclusion of for the corresponding code points. Entries in the table may have multiple source reference values.

2 Repertoire

Repertoire Summary

Number of elements in Repertoire 44
Number of code points
for each script
Georgian 33
Common 11
Longest code point sequence 1

Repertoire by Code Point

The following table lists the repertoire by code point (or code point sequence). The data in the Script and Name column are extracted from the Unicode character database. Where a comment in the original LGR is equal to the character name, it has been suppressed.

See also the legend provided below the table.

Code
Point		 Glyph Script Name Ref Tags Required Context Comment
U+002D - Common HYPHEN-MINUS [0] Hyphen not: hyphen-minus-disallowed ⍟
U+0030 0 Common DIGIT ZERO [0] Common-digit   ⍟
U+0031 1 Common DIGIT ONE [0] Common-digit   ⍟
U+0032 2 Common DIGIT TWO [0] Common-digit   ⍟
U+0033 3 Common DIGIT THREE [0] Common-digit   ⍟
U+0034 4 Common DIGIT FOUR [0] Common-digit   ⍟
U+0035 5 Common DIGIT FIVE [0] Common-digit   ⍟
U+0036 6 Common DIGIT SIX [0] Common-digit   ⍟
U+0037 7 Common DIGIT SEVEN [0] Common-digit   ⍟
U+0038 8 Common DIGIT EIGHT [0] Common-digit   ⍟
U+0039 9 Common DIGIT NINE [0] Common-digit   ⍟
U+10D0 ა Georgian GEORGIAN LETTER AN [0], [100]     Georgian
U+10D1 ბ Georgian GEORGIAN LETTER BAN [0], [100]     Georgian
U+10D2 გ Georgian GEORGIAN LETTER GAN [0], [100]     Georgian
U+10D3 დ Georgian GEORGIAN LETTER DON [0], [100]     Georgian
U+10D4 ე Georgian GEORGIAN LETTER EN [0], [100]     Georgian
U+10D5 ვ Georgian GEORGIAN LETTER VIN [0], [100]     Georgian
U+10D6 ზ Georgian GEORGIAN LETTER ZEN [0], [100]     Georgian
U+10D7 თ Georgian GEORGIAN LETTER TAN [0], [100]     Georgian
U+10D8 ი Georgian GEORGIAN LETTER IN [0], [100]     Georgian
U+10D9 კ Georgian GEORGIAN LETTER KAN [0], [100]     Georgian
U+10DA ლ Georgian GEORGIAN LETTER LAS [0], [100]     Georgian
U+10DB მ Georgian GEORGIAN LETTER MAN [0], [100]     Georgian
U+10DC ნ Georgian GEORGIAN LETTER NAR [0], [100]     Georgian
U+10DD ო Georgian GEORGIAN LETTER ON [0], [100]     Georgian
U+10DE პ Georgian GEORGIAN LETTER PAR [0], [100]     Georgian
U+10DF ჟ Georgian GEORGIAN LETTER ZHAR [0], [100]     Georgian
U+10E0 რ Georgian GEORGIAN LETTER RAE [0], [100]     Georgian
U+10E1 ს Georgian GEORGIAN LETTER SAN [0], [100]     Georgian
U+10E2 ტ Georgian GEORGIAN LETTER TAR [0], [100]     Georgian
U+10E3 უ Georgian GEORGIAN LETTER UN [0], [100]     Georgian
U+10E4 ფ Georgian GEORGIAN LETTER PHAR [0], [100]     Georgian
U+10E5 ქ Georgian GEORGIAN LETTER KHAR [0], [100]     Georgian
U+10E6 ღ Georgian GEORGIAN LETTER GHAN [0], [100]     Georgian
U+10E7 ყ Georgian GEORGIAN LETTER QAR [0], [100]     Georgian
U+10E8 შ Georgian GEORGIAN LETTER SHIN [0], [100]     Georgian
U+10E9 ჩ Georgian GEORGIAN LETTER CHIN [0], [100]     Georgian
U+10EA ც Georgian GEORGIAN LETTER CAN [0], [100]     Georgian
U+10EB ძ Georgian GEORGIAN LETTER JIL [0], [100]     Georgian
U+10EC წ Georgian GEORGIAN LETTER CIL [0], [100]     Georgian
U+10ED ჭ Georgian GEORGIAN LETTER CHAR [0], [100]     Georgian
U+10EE ხ Georgian GEORGIAN LETTER XAN [0], [100]     Georgian
U+10EF ჯ Georgian GEORGIAN LETTER JHAN [0], [100]     Georgian
U+10F0 ჰ Georgian GEORGIAN LETTER HAE [0], [100]     Georgian

Legend

Code Point
A code point or code point sequence.
Glyph
The shape displayed depends on the fonts available to your browser.
Script
Shows the script property value from the Unicode Character Database. Combining marks may have the value Inherited and code points used with more than one script may have the value Common.
Name
Shows the character or sequence name from the Unicode Character Database.
Ref
Links to the references associated with the code point or sequence, if any.
Tags
LGR-defined tag values. Any tags matching the Unicode script property are suppressed in this view.
Required Context
Link to a rule defining the required context a code point or sequence must satisfy. If prefixed by “not:” identifies a context that must not occur.
Comment
The comment as given in the XML file. However, if the comment for this row consists only of the code point or sequence name, it is suppressed in this view. By convention, comments starting with “=” denote an alias. If present, the symbol ⍟ marks a default item shared among a set of LGRs.

3 Variant Sets

This LGR does not specify any variants.

4 Classes, Rules and Actions

4.1 Character Classes

The following table lists all named and implicit classes with their definition and a list of their members intersected with the current repertoire (for larger classes, this list is elided).

Name Definition Count Members or Ranges Ref Comment
hyphen Tag=Hyphen 1 {002D}   The Hyphen-minus character ⍟
implicit Tag=Common-digit 10 {0030-0039}   Any character tagged as Common-digit
implicit Tag=sc:Geor 33 {10D0-10F0}   Any character tagged as Georgian
implicit Tag=sc:Zyyy 11 {002D 0030-0039}   Any character tagged as Common

Legend

Members or Ranges
Lists the members of the class as code points (xxx) or as ranges of code points (xxx-yyy). Any class too numerous to list in full is elided with "...".
Tag=ttt
A named or implicit class defined by all code points that share the given tag value (ttt).
Implicit
An anonymous class implicitly defined based on tag value for which there is no named equivalent.

4.2 Whole label evaluation and context rules

The following table lists all named rules defined in the LGR and indicates whether they are used as trigger in an action or as context (when or not-when) for a code point or variant.

Name Regular Expression Used as
Trigger		 Anchor Used as
Context		 Ref Comment
leading-combining-mark (start)[∅=[[∅=\p{gc=Mn}] ∪ [∅=\p{gc=Mc}]]] ✔     [150] RFC 5891 restrictions on placement of combining marks ⍟
hyphen-minus-disallowed (((start))← ⚓)|(⚓ →((end)))|(((start)..[:hyphen:])← ⚓)   ✔ C [150] RFC 5891 restrictions on placement of U+002D (-) ⍟
ascii-only-label (start)[\u002D\u0030-\u0039]+(end) ✔     [150] RFC 5891 restriction requiring at least one non-ASCII code point ⍟

Legend

Used as Trigger
This rule triggers one of the actions listed below.
Used as Context
This rule defines a required or prohibited context for a code point C or variant V.
Anchor
This rule has a placeholder for the code point for which it is evaluated.
Regular Expression
A regular expression equivalent to the rule, shown in a modified notation as noted:
⚓ - context anchor
Placeholder for the actual code point when a context is evaluated. The code point must occur at the position corresponding to the anchor. Rules containing an anchor cannot be used as triggers.
(...)← - look-behind
If present encloses required context preceding the anchor.
→(..) - look-ahead
If present encloses required context following the anchor.
(... | ...) - choice
When there is more than one alternative in a rule, the choices are separated by the alternation operator (...|...).
start or end
(start) matches the start of the label; (end) matches the end of the label.
. - any code point
. matches any code point.
*, +, ?, {n,m} - count operators
* indicates 0 or more, + indicates one or more, and ? indicates up to one instance. {n,m} indicates at least n and at most m instances.
[ ] - explicit character set
For explicit character sets that are part of a rule, only those members are shown that are defined in this LGR.
[: :] - named or implicit character set
Reference to a named character set [:name:] or an implicit character set [:tag:]. A leading “^” before name or tag indicates the set complement.
[\p{ }] - property character set
Set of all characters matching a given value for a Unicode property [\p{prop=val}]. Note: uppercase “\P” defines the complement of a property set.
∪, ∩, ∖, ∆ - set operators
Sets may be combined by set operators (∪ = union, ∩ = intersection, ∖ = difference, ∆ = symmetric difference).
∅= - empty set
Indicates that the following set is empty because of the result of set operations, or because none of its elements is part of the repertoire defined here. A rule with a non-optional empty set never matches.
⍟ - default rule
Rules marked with ⍟ are included by default and may or may not be triggered by any possible label under this LGR.

4.3 Actions

The following table lists the actions that are used to assign dispositions to labels and variant labels based on the specified conditions. The order of actions defines their precedence: the first action triggered by a label is the one defining its disposition.

# Condition Rule / Variant Set   Disposition Ref Comment
1 if label matches leading-combining-mark → invalid [150] labels with leading combining marks are invalid ⍟
2 if label matches ascii-only-label → invalid [150] ascii-only labels invalid (not IDNs) ⍟
3 if at least one variant is in {out-of-repertoire-var} → invalid   any variant label with a code point out of repertoire is invalid ⍟
4 if at least one variant is in {blocked} → blocked   any variant label containing blocked variants is blocked ⍟
5 if each variant is in {allocatable} → allocatable   variant labels with all variants allocatable are allocatable ⍟
6 if any label (catch-all)   → valid   catch all (default action) ⍟

Legend

{...} - variant type set
In the “Rule/Variant Set” column, the notation {...} means a set of variant types.
⍟ - default action
Actions marked with ⍟ are included by default and may or may not be triggered by any possible label under this LGR.

5 Table of References

The following lists the references cited for specific code points, variants, classes, rules or actions in this LGR. For General references refer to the "References" section in the Description.

[0] The Unicode Standard 1.1
Any code point originally encoded in Unicode 1.1
[100] Omniglot Georgian Mkhedruli,
https://www.omniglot.com/writing/georgian.htm#mkhedruli
[150] RFC 5891, Internationalized Domain Names in Applications (IDNA): Protocol
http://tools.ietf.org/html/rfc5891