Root Zone LGR for script: Greek (Grek) | rz-lgr-5-greek-script-26may22-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 | 2022-05-26
LGR Version | 5 (Root Zone Label Generation Rules for the Greek Script)
Language | und-Grek (Greek Script)
Scope | domain: "." (Root)
Unicode Version | 11.0.0

## Table of Contents

# Description

# Root Zone Label Generation Rules for the Greek Script

## Overview

This file contains Label Generation Rules (LGR) for the Greek script for the Root Zone. For more details on this LGR and additional background on the script, see “Proposal for a Greek Script Root Zone Label Generation Ruleset (LGR)” [Proposal-Greek]. This file is one of a set of LGR files that together form an integrated LGR for the DNS Root Zone [RZ-LGR-5]. The format of this file follows [RFC 7940].

## Repertoire

The Root Zone LGR for the Greek script lists 36 unique code points. The repertoire includes code points used by the modern-day Greek language, which is the official language of Greece and Cyprus. The repertoire also covers the Pomak language, which is the only “non-Greek” language that uses Greek characters nowadays. For more details, see Section 5 “Repertoire” in [Proposal-Greek]).

The repertoire is based on [MSR-5], which is a subset of Unicode 11.0 [Unicode 11.0]. No Greek code points from MSR-5 have been excluded.

Code points outside the Greek script that are listed in this file are targets for out-of-script variants and are identified by a reflexive (identity) variant of type “out-of-repertoire-var”. They do not form part of the repertoire.

As part of the Root Zone, this LGR includes neither decimal digits nor the HYPHEN-MINUS.

Each code point is tagged with the script or scripts with which the code points is used, and one or more references documenting sufficient justification for inclusion in the repertoire; see “References” below.

## Variants

According to Section 6 “Variants”, in [Proposal-Greek], this LGR defines the following categories of variants:

### Vowels with/without Tonos and/or Diaeresis

Vowels without tonos and/or diaeresis are treated as allocatable in-script variants of their forms without tonos and/or dialytika. The variants in the opposite direction and between forms with tonos and dialytika, for example, are of type “blocked”. To reduce the number of allocatable labels in case the applied-for label contains multiple vowels with diacritics, the LGR defines special variant types and actions so that only two allocatable variants are allowed for each label: the label as applied-for (original label), and the label with all unaccented vowels (base forms). Note that this restriction is independent of the restriction on variants of sigma, see below, so that a total of up to four allocatable labels may exist.

For more details, see Section 6.1.2 in [Proposal-Greek]).

### Sigma and Final Sigma

‘Sigma’ is the 18th character of the Greek alphabet, corresponding to /s/. There are two forms of lowercase sigma: U+03C3 (σ) GREEK SMALL LETTER SIGMA and U+03C2 (ς) GREEK SMALL LETTER FINAL SIGMA. The final sigma is used instead of the lowercase sigma at the end of words, but it may also occur at other points of a label. The lowercase sigma is treated as an allocatable in-script variant of the final sigma, but not in the reverse. To reduce the number of allocatable labels in case the applied-for label contains multiple final sigmas, the LGR defines special variant types and actions so that only two allocatable variants are allowed for each label: the label as applied-for (original label), and the label with only regular sigmas. Note that this restriction is independent of the restriction on variants of vowels, see above, so that a total of up to four allocatable labels may exist.

For more details, see Section 6.1.3 in [Proposal-Greek]).

### In-script Variant Mapping Types

Code points for the accented forms of vowels have been given a reflexive variant type of “r-diac”. The code point for the final form has been given the reflexive variant type “r-final”. (By convention, the prefix “r-“ marks a type used in a reflexive variant mapping, that is, it represents an instance of the original code point at that location in a variant label, see Section 5.3.4 in [RFC 7940].)

Variant mappings to the base forms of vowels are of type “base” and the variant mapping to the nonfinal form of sigma is of type “nonfinal”. Special <action> elements defined for this LGR use these types to ensure the following restrictions. (See also “Greek-specific Actions” below.)

- blocked — a variant label containing a blocked variant will receive a disposition of “blocked”.
- r-diac r-final — a label containing one or more of these reflexive variant types and no others represents an original label and receives a disposition of “allocatable”
- base nonfinal — a label containing one or more of these variant types and no others represents a label that contains only unaccented vowels and/or standard sigmas and receives a disposition of “allocatable”
- base r-final — a label containing one or more of these variant types and no others represents a label that contains only unaccented vowels but any sigma forms as in the applied-for label and receives a disposition of “allocatable”
- r-diac nonfinal — a label containing one or more of these variant types and no others represents a label that contains any vowel forms as in the applied-for label and only nonfinal sigmas and receives a disposition of “allocatable”
- base nonfinal — any label remaining containing any of these variant types represents a variant label that contains a mixture of vowel forms or sigmas and receives a disposition of “blocked”

As result of these actions, any label as applied for may result in at most four allocatable labels, however, if it is applied for without diacritics or final sigmas it will not result in any allocatable variant labels.

### Cross-script variants

Cross-script variants are defined based on “identical” appearance. Such out-of-repertoire variants are defined with a comment “Cross-script homoglyph” or “Cross-script near homoglyph”. The largest number of such variants are with the closely related scripts, Armenian, Cyrillic and Latin, but a few simple letter shapes also may have correspondence with those in less related scripts.

For more details, see Section 6.1.4 in [Proposal-Greek]).

Additional Variants: This LGR inherits additional blocked cross-script variants by integration; they may not be listed here unless they result in in-script variants. However, for consistency, the variant mappings among the related scripts Armenian, Cyrillic, Greek and Latin are listed in full. Any variants required for cross-script transitivity are generally not marked. See the merged, Common LGR [RZ-LGR-5] for details of all applicable cross-script variants, including any not listed here; always use the Common LGR for determining cross-script collisions of labels.

## Character Classes

The LGR defines no character classes.

## Whole Label Evaluation (WLE) and Context Rules

### Default Whole Label Evaluation Rules and Actions

The LGR includes the set of required default WLE rules and actions applicable to the Root Zone and defined in [MSR-5]. They are marked with ⍟.

### Greek specific Rules

This LGR does not define Greek-specific Whole Label Evaluation Rules.

### Default Actions

The LGR includes the set of required default actions applicable to the Root Zone and defined in [MSR-5]. They are marked with ⍟.

### Greek-specific Actions

The LGR contains additional Greek-specific actions as described in Section 7 “Whole Label Evaluation (WLE) Rules and Actions” of [Proposal-Greek]. These resolve the extended set of variant types into a disposition for variant labels of either “allocatable” or “blocked”. Greek-specific actions that are triggered by the LGR-specific variant types described above limit the “allocatable” variant labels to those containing only unaccented vowel or nonfinal sigma variants or both, while disallowing mixed use of accented and unaccented vowels or final and nominal forms of sigma, except as in the original applied-for label. To account for original labels, reflexive variant mappings with an “r-” prefix are used. (See [RFC 7940]).

Note that variant mapping types are not symmetric: they depend on which code point is considered the source or the target in a given mapping. As specified in [RFC 7940], mapping types are evaluated for each permutation of a label and its variants, with code points that are unchanged in a given label given the type of their “reflexive” mapping. The actions finally evaluate the collected set of mapping types and resolve them into one of two dispositions for the variant label. Per [RFC 7940] actions are always applied one after the other, and the evaluation stops at the first action that assigns a disposition to a given label.

For more information on how to assign a variant label disposition under this LGR, see Section 8, “Designing Dispositions and Whole Label Evaluation Rules (WLE)” in [Proposal-Greek]. The specification of variants in the LGR follows the guidelines in [RFC 8228].

## Methodology and Contributors

The Root Zone LGR for the Greek script was developed by the Greek Generation Panel. The process followed by the Panel was according to work plan given in “Proposal for the Generation Panel for the Greek Script Label Generation Ruleset for the Root Zone”. For additional detail on methodology and contributors see Sections 4 and 8 in [Proposal-Greek], as well as [RZ-LGR-5-Overview].

## References

The following general references are cited in this document:

[MSR-5]
  Integration Panel, “Maximal Starting Repertoire — MSR-5 Overview and Rationale”, 24 June 2021,
  https://www.icann.org/en/system/files/files/msr-5-overview-24jun21-en.pdf
[Proposal-Greek]
  Greek Generation Panel, “Proposal for a Greek Script Root Zone Label Generation Ruleset (LGR)”, 1 February 2022,
  https://www.icann.org/en/system/files/files/proposal-greek-lgr-01feb22-en.pdf
[RFC 7940]
  Davies, K. and A. Freytag, “Representing Label Generation Rulesets Using XML”, RFC 7940, August 2016,
  https://www.rfc-editor.org/info/rfc7940.
[RFC 8228]
  A. Freytag, “Guidance on Designing Label Generation Rulesets (LGRs) Supporting Variant Labels”, RFC 8228, August 2017,
  https://www.rfc-editor.org/info/rfc8228
[EGIDS]
  Lewis and Simons, “EGIDS: Expanded Graded Intergenerational Disruption Scale,” documented in [SIL-Ethnologue] and summarized here:
  https://en.wikipedia.org/wiki/Expanded_Graded_Intergenerational_Disruption_Scale_(EGIDS)
[RZ-LGR-5-Overview]
  Integration Panel, “Root Zone Label Generation Rules (RZ LGR-5): Overview and Summary”, 26 May 2022,
  https://www.icann.org/sites/default/files/lgr/rz-lgr-5-overview-26may22-en.pdf
[RZ-LGR-5]
  Integration Panel, “Root Zone Label Generation Rules (RZ-LGR-5)”, 26 May 2022 (XML),
  https://www.icann.org/sites/default/files/lgr/rz-lgr-5-common-26may22-en.xml
  non-normative HTML presentation:
  https://www.icann.org/sites/default/files/lgr/rz-lgr-5-common-26may22-en.html
[SIL-Ethnologue]
  David M. Eberhard, Gary F. Simons & Charles D. Fennig (eds.). 2021. Ethnologue: Languages of the World, Twenty fourth edition. Dallas, Texas: SIL International. Online version available as
  https://www.ethnologue.com
[Unicode 11.0]
  The Unicode Consortium. The Unicode Standard, Version 11.0.0, (Mountain View, CA: The Unicode Consortium, 2018. ISBN 978-1-936213-19-1)
  https://www.unicode.org/versions/Unicode11.0.0/

For references consulted particularly in designing the repertoire for the Greek script for the Root Zone 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 [101] corresponds to the source given in [Proposal-Greek] for justifying the inclusion of the corresponding code points. Single code point or ranges may have multiple source reference values.

# Repertoire

## Repertoire Summary

Number of elements in repertoire | 36
Out-of-repertoire variants | 42
Total entries in table | 78
Number of code points for each script |
Armenian | 5
Cyrillic | 10
Greek | 36
Latin | 25
Number of code points | 76
Number of sequences | 2
Longest code point sequence | 2

## 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.

For any code point or sequence for which a variant is defined, additional information is provided in the Variants column. Some code points or sequences listed in the following table are not part of the repertoire itself; they document targets for out-of-repertoire variant mappings as indicated. See also the legend provided below the table.

Code Point | Glyph | Script | Name | Ref | Part of Repertoire | Variants | Comment
--- | --- | --- | --- | --- | --- | --- | ---
U+0061 | a | Latin | LATIN SMALL LETTER A | [0] | ✗ | set 1 | Not part of repertoire
U+0069 | i | Latin | LATIN SMALL LETTER I | [0] | ✗ | set 2 | Not part of repertoire
U+006E | n | Latin | LATIN SMALL LETTER N | [0] | ✗ | set 3 | Not part of repertoire
U+006F | o | Latin | LATIN SMALL LETTER O | [0] | ✗ | set 4 | Not part of repertoire
U+0070 | p | Latin | LATIN SMALL LETTER P | [0] | ✗ | set 5 | Not part of repertoire
U+0073 U+0073 | ss | {Latin} | LATIN SMALL LETTER S + LATIN SMALL LETTER S |  | ✗ | set 6 | Not part of repertoire
U+0075 | u | Latin | LATIN SMALL LETTER U | [0] | ✗ | set 7 | Not part of repertoire
U+0076 | v | Latin | LATIN SMALL LETTER V | [0] | ✗ | set 8 | Not part of repertoire
U+0079 | y | Latin | LATIN SMALL LETTER Y | [0] | ✗ | set 9 | Not part of repertoire
U+00DF | ß | Latin | LATIN SMALL LETTER SHARP S | [0] | ✗ | set 6 | Not part of repertoire
U+00E1 | á | Latin | LATIN SMALL LETTER A WITH ACUTE | [0] | ✗ | set 1 | Not part of repertoire
U+00ED | í | Latin | LATIN SMALL LETTER I WITH ACUTE | [0] | ✗ | set 2 | Not part of repertoire
U+00EF | ï | Latin | LATIN SMALL LETTER I WITH DIAERESIS | [0] | ✗ | set 2 | Not part of repertoire
U+00F3 | ó | Latin | LATIN SMALL LETTER O WITH ACUTE | [0] | ✗ | set 4 | Not part of repertoire
U+00FA | ú | Latin | LATIN SMALL LETTER U WITH ACUTE | [0] | ✗ | set 7 | Not part of repertoire
U+00FC | ü | Latin | LATIN SMALL LETTER U WITH DIAERESIS | [0] | ✗ | set 7 | Not part of repertoire
U+0131 | ı | Latin | LATIN SMALL LETTER DOTLESS I | [0] | ✗ | set 2 | Not part of repertoire
U+0144 | ń | Latin | LATIN SMALL LETTER N WITH ACUTE | [0] | ✗ | set 3 | Not part of repertoire
U+014B | ŋ | Latin | LATIN SMALL LETTER ENG | [0] | ✗ | set 3 | Not part of repertoire
U+01A1 | ơ | Latin | LATIN SMALL LETTER O WITH HORN | [0] | ✗ | set 10 | Not part of repertoire
U+025B | ɛ | Latin | LATIN SMALL LETTER OPEN E | [0] | ✗ | set 11 | Not part of repertoire
U+0263 | ɣ | Latin | LATIN SMALL LETTER GAMMA | [0] | ✗ | set 9 | Not part of repertoire
U+0269 | ɩ | Latin | LATIN SMALL LETTER IOTA | [0] | ✗ | set 2 | Not part of repertoire
U+028B | ʋ | Latin | LATIN SMALL LETTER V WITH HOOK | [0] | ✗ | set 7 | Not part of repertoire
U+0390 | ΐ | Greek | GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS | [0], [101] | ✔ | set 2 |
U+03AC | ά | Greek | GREEK SMALL LETTER ALPHA WITH TONOS | [0], [101] | ✔ | set 1 |
U+03AD | έ | Greek | GREEK SMALL LETTER EPSILON WITH TONOS | [0], [101] | ✔ | set 11 |
U+03AE | ή | Greek | GREEK SMALL LETTER ETA WITH TONOS | [0], [101] | ✔ | set 3 |
U+03AF | ί | Greek | GREEK SMALL LETTER IOTA WITH TONOS | [0], [101] | ✔ | set 2 |
U+03B0 | ΰ | Greek | GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS | [0], [101] | ✔ | set 7 |
U+03B1 | α | Greek | GREEK SMALL LETTER ALPHA | [0], [101] | ✔ | set 1 |
U+03B2 | β | Greek | GREEK SMALL LETTER BETA | [0], [101] | ✔ | set 6 |
U+03B3 | γ | Greek | GREEK SMALL LETTER GAMMA | [0], [101] | ✔ | set 9 |
U+03B4 | δ | Greek | GREEK SMALL LETTER DELTA | [0], [101] | ✔ |  |
U+03B5 | ε | Greek | GREEK SMALL LETTER EPSILON | [0], [101] | ✔ | set 11 |
U+03B6 | ζ | Greek | GREEK SMALL LETTER ZETA | [0], [101] | ✔ |  |
U+03B7 | η | Greek | GREEK SMALL LETTER ETA | [0], [101] | ✔ | set 3 |
U+03B8 | θ | Greek | GREEK SMALL LETTER THETA | [0], [101] | ✔ |  |
U+03B9 | ι | Greek | GREEK SMALL LETTER IOTA | [0], [101] | ✔ | set 2 |
U+03BA | κ | Greek | GREEK SMALL LETTER KAPPA | [0], [101] | ✔ | set 12 |
U+03BB | λ | Greek | GREEK SMALL LETTER LAMDA | [0], [101] | ✔ |  |
U+03BC | μ | Greek | GREEK SMALL LETTER MU | [0], [101] | ✔ |  |
U+03BD | ν | Greek | GREEK SMALL LETTER NU | [0], [101] | ✔ | set 8 |
U+03BE | ξ | Greek | GREEK SMALL LETTER XI | [0], [101] | ✔ |  |
U+03BF | ο | Greek | GREEK SMALL LETTER OMICRON | [0], [101] | ✔ | set 4 |
U+03C0 | π | Greek | GREEK SMALL LETTER PI | [0], [101] | ✔ |  |
U+03C1 | ρ | Greek | GREEK SMALL LETTER RHO | [0], [101] | ✔ | set 5 |
U+03C2 | ς | Greek | GREEK SMALL LETTER FINAL SIGMA | [0], [101] | ✔ | set 10 |
U+03C3 | σ | Greek | GREEK SMALL LETTER SIGMA | [0], [101] | ✔ | set 10 |
U+03C4 | τ | Greek | GREEK SMALL LETTER TAU | [0], [101] | ✔ | set 13 |
U+03C5 | υ | Greek | GREEK SMALL LETTER UPSILON | [0], [101] | ✔ | set 7 |
U+03C6 | φ | Greek | GREEK SMALL LETTER PHI | [0], [101] | ✔ | set 14 |
U+03C7 | χ | Greek | GREEK SMALL LETTER CHI | [0], [101] | ✔ |  |
U+03C8 | ψ | Greek | GREEK SMALL LETTER PSI | [0], [101] | ✔ |  |
U+03C9 | ω | Greek | GREEK SMALL LETTER OMEGA | [0], [101] | ✔ | set 15 |
U+03CA | ϊ | Greek | GREEK SMALL LETTER IOTA WITH DIALYTIKA | [0], [101] | ✔ | set 2 |
U+03CB | ϋ | Greek | GREEK SMALL LETTER UPSILON WITH DIALYTIKA | [0], [101] | ✔ | set 7 |
U+03CC | ό | Greek | GREEK SMALL LETTER OMICRON WITH TONOS | [0], [101] | ✔ | set 4 |
U+03CD | ύ | Greek | GREEK SMALL LETTER UPSILON WITH TONOS | [0], [101] | ✔ | set 7 |
U+03CE | ώ | Greek | GREEK SMALL LETTER OMEGA WITH TONOS | [0], [101] | ✔ | set 15 |
U+0430 | а | Cyrillic | CYRILLIC SMALL LETTER A | [0] | ✗ | set 1 | Not part of repertoire
U+043A | к | Cyrillic | CYRILLIC SMALL LETTER KA | [0] | ✗ | set 12 | Not part of repertoire
U+043E | о | Cyrillic | CYRILLIC SMALL LETTER O | [0] | ✗ | set 4 | Not part of repertoire
U+0440 | р | Cyrillic | CYRILLIC SMALL LETTER ER | [0] | ✗ | set 5 | Not part of repertoire
U+0442 | т | Cyrillic | CYRILLIC SMALL LETTER TE | [0] | ✗ | set 13 | Not part of repertoire
U+0443 | у | Cyrillic | CYRILLIC SMALL LETTER U | [0] | ✗ | set 9 | Not part of repertoire
U+0444 | ф | Cyrillic | CYRILLIC SMALL LETTER EF | [0] | ✗ | set 14 | Not part of repertoire
U+0455 U+0455 | ѕѕ | {Cyrillic} | CYRILLIC SMALL LETTER DZE + CYRILLIC SMALL LETTER DZE |  | ✗ | set 6 | Not part of repertoire
U+0456 | і | Cyrillic | CYRILLIC SMALL LETTER BYELORUSSIAN-UKRAINIAN I | [0] | ✗ | set 2 | Not part of repertoire
U+0457 | ї | Cyrillic | CYRILLIC SMALL LETTER YI | [0] | ✗ | set 2 | Not part of repertoire
U+04AF | ү | Cyrillic | CYRILLIC SMALL LETTER STRAIGHT U | [0] | ✗ | set 9 | Not part of repertoire
U+0572 | ղ | Armenian | ARMENIAN SMALL LETTER GHAD | [0] | ✗ | set 3 | Not part of repertoire
U+0578 | ո | Armenian | ARMENIAN SMALL LETTER VO | [0] | ✗ | set 3 | Not part of repertoire
U+057D | ս | Armenian | ARMENIAN SMALL LETTER SEH | [0] | ✗ | set 7 | Not part of repertoire
U+0582 | ւ | Armenian | ARMENIAN SMALL LETTER YIWN | [0] | ✗ | set 2 | Not part of repertoire
U+0585 | օ | Armenian | ARMENIAN SMALL LETTER OH | [0] | ✗ | set 4 | Not part of repertoire
U+1E45 | ṅ | Latin | LATIN SMALL LETTER N WITH DOT ABOVE | [0] | ✗ | set 3 | Not part of repertoire
U+1EC9 | ỉ | Latin | LATIN SMALL LETTER I WITH HOOK ABOVE | [0] | ✗ | set 2 | Not part of repertoire

Legend

Throughout this LGR, a code point sequence may be annotated with a string in ALL CAPS that is constructed on the same principle as a name for a Unicode Named Sequence. No claim is made that a sequence thus annotated is in fact a named sequence, nor that the annotation in such case actually corresponds to the formal name of a named sequence.

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. Sequences are annotated with a set of all distinct script values.
Name
  Shows the character or sequence name from the Unicode Character Database. Named sequences are listed with their normative names, for ad-hoc sequences the individual names are shown separated by “+”.
Ref
  Links to the references associated with the code point or sequence, if any.
Variants
  Link to the variant set the code point or sequence is a member of, except where a coded point or sequence maps only to itself, in which case the type of that mapping is listed.
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.
✔ - core repertoire
  A check mark in the Part-of-repertoire column indicates a code point is part of the core repertoire.
✗ - out-of-repertoire
  A code point shown with ✗ is not part of the repertoire. It is listed only because it is the target of an out-of-repertoire-var variant mapping.

# Variant Sets

## Variant Set Summary

Number of variant sets | 15
Largest variant set | 13
Ordinary Variants by Type |
base | 11
blocked | 382
nonfinal | 1
Reflexive Variants by Type |
out-of-repertoire-var | 42
r-diac | 11
r-final | 1

The following tables list all variant sets defined in this LGR, except for singleton sets. Each table lists all variant mapping pairs of the set; one per row. Mappings are assumed to be symmetric: each row documents both forward (→) and reverse (←) mapping directions. In each table, the mappings are sorted by Source value in ascending code point order; shading is used to group mappings from the same source code point or sequence.

Where the type of both forward and reverse mappings are the same, a single value is given in the Type column; otherwise the types for forward and reverse mappings, as well as comments and references, are listed above one another. For summary counts, both forward and reverse mappings are always counted separately.

A mapping where source and target are the same is reflexive. Variant sets consisting of only a single reflexive mapping are not shown as a set. Instead, the variant type of the mapping is listed in the Variants column of the Repertoire by Code Point table. Reflexive mappings that are part of a larger set are indicated with a “≡” and are counted once per entry.

In any LGR with variant specifications that are well behaved, all members within each variant set are defined as variants of each other; the mappings in each set are symmetric and transitive; and all variant sets are disjoint.

Common Legend

Source
  By convention, the smaller of the two code points in a variant mapping pair.
Target
  By convention, the larger of the two code points in a variant mapping pair.
Glyph
  The shape displayed for source or target depends on the fonts available to your browser.
→ - forward
  Indicates that Type, Ref and Comment apply to the mapping from source to target.
← - reverse
  Indicates that Type, Ref and Comment apply to the reverse mapping from target to source.
↔ - both
  Indicates that Type, Ref and Comment apply to both forward and reverse mapping.
≡ - reflexive
  Indicates that Type, Ref and Comment are for a reflexive mapping where source equals target.
Type
  The type of the variant mapping, including predefined variant types such as “allocatable” and “blocked”; or any that are defined specifically for this LGR. A reflexive variant type “out-of-repertoire-var” designates the target as not part of the repertoire; it is required as target for one or more variant mappings that cross repertoire boundaries. In this LGR, types for variants between out-of-repertoire code points are shown in italic while types for pure in-repertoire variants are shown in bold.
Ref
  One or more reference IDs (optional). A “/” separates references for reverse / forward mappings, if different.
Comment
  A descriptive comment (optional). A “/” separates comments for reverse / forward mappings, if different.

### Variant Set 1 — 5 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
0061 | a | 0061 | a | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0061 | a | 00E1 | á | ↔ | blocked |  |
0061 | a | 03AC | ά | ↔ | blocked |  |
0061 | a | 03B1 | α | ↔ | blocked |  | Cross-script near homoglyph
0061 | a | 0430 | а | ↔ | blocked |  |
00E1 | á | 00E1 | á | ≡ | out-of-repertoire-var |  | Out-of-repertoire
00E1 | á | 03AC | ά | ↔ | blocked |  | Cross-script near homoglyph
00E1 | á | 03B1 | α | ↔ | blocked |  |
00E1 | á | 0430 | а | ↔ | blocked |  |
03AC | ά | 03AC | ά | ≡ | r-diac |  | Greek letter with diacritic
03AC | ά | 03B1 | α | → | base |  | Base form variant
← | blocked |  | Diacritic variant
03AC | ά | 0430 | а | ↔ | blocked |  |
03B1 | α | 0430 | а | ↔ | blocked |  | Cross-script near homoglyph
0430 | а | 0430 | а | ≡ | out-of-repertoire-var |  | Out-of-repertoire

### Variant Set 2 — 13 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
0069 | i | 0069 | i | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0069 | i | 00ED | í | ↔ | blocked |  |
0069 | i | 00EF | ï | ↔ | blocked |  |
0069 | i | 0131 | ı | ↔ | blocked |  |
0069 | i | 0269 | ɩ | ↔ | blocked |  |
0069 | i | 0390 | ΐ | ↔ | blocked |  |
0069 | i | 03AF | ί | ↔ | blocked |  |
0069 | i | 03B9 | ι | ↔ | blocked |  | Cross-script near homoglyph
0069 | i | 03CA | ϊ | ↔ | blocked |  |
0069 | i | 0456 | і | ↔ | blocked |  |
0069 | i | 0457 | ї | ↔ | blocked |  |
0069 | i | 0582 | ւ | ↔ | blocked |  |
0069 | i | 1EC9 | ỉ | ↔ | blocked |  |
00ED | í | 00ED | í | ≡ | out-of-repertoire-var |  | Out-of-repertoire
00ED | í | 00EF | ï | ↔ | blocked |  |
00ED | í | 0131 | ı | ↔ | blocked |  |
00ED | í | 0269 | ɩ | ↔ | blocked |  |
00ED | í | 0390 | ΐ | ↔ | blocked |  |
00ED | í | 03AF | ί | ↔ | blocked |  | Cross-script homoglyph
00ED | í | 03B9 | ι | ↔ | blocked |  |
00ED | í | 03CA | ϊ | ↔ | blocked |  |
00ED | í | 0456 | і | ↔ | blocked |  |
00ED | í | 0457 | ї | ↔ | blocked |  |
00ED | í | 0582 | ւ | ↔ | blocked |  |
00ED | í | 1EC9 | ỉ | ↔ | blocked |  |
00EF | ï | 00EF | ï | ≡ | out-of-repertoire-var |  | Out-of-repertoire
00EF | ï | 0131 | ı | ↔ | blocked |  |
00EF | ï | 0269 | ɩ | ↔ | blocked |  |
00EF | ï | 0390 | ΐ | ↔ | blocked |  |
00EF | ï | 03AF | ί | ↔ | blocked |  |
00EF | ï | 03B9 | ι | ↔ | blocked |  |
00EF | ï | 03CA | ϊ | ↔ | blocked |  | Cross-script homoglyph
00EF | ï | 0456 | і | ↔ | blocked |  |
00EF | ï | 0457 | ї | ↔ | blocked |  |
00EF | ï | 0582 | ւ | ↔ | blocked |  |
00EF | ï | 1EC9 | ỉ | ↔ | blocked |  |
0131 | ı | 0131 | ı | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0131 | ı | 0269 | ɩ | ↔ | blocked |  |
0131 | ı | 0390 | ΐ | ↔ | blocked |  |
0131 | ı | 03AF | ί | ↔ | blocked |  |
0131 | ı | 03B9 | ι | ↔ | blocked |  | Cross-script homoglyph
0131 | ı | 03CA | ϊ | ↔ | blocked |  |
0131 | ı | 0456 | і | ↔ | blocked |  |
0131 | ı | 0457 | ї | ↔ | blocked |  |
0131 | ı | 0582 | ւ | ↔ | blocked |  |
0131 | ı | 1EC9 | ỉ | ↔ | blocked |  |
0269 | ɩ | 0269 | ɩ | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0269 | ɩ | 0390 | ΐ | ↔ | blocked |  |
0269 | ɩ | 03AF | ί | ↔ | blocked |  |
0269 | ɩ | 03B9 | ι | ↔ | blocked |  | Cross-script homoglyph
0269 | ɩ | 03CA | ϊ | ↔ | blocked |  |
0269 | ɩ | 0456 | і | ↔ | blocked |  |
0269 | ɩ | 0457 | ї | ↔ | blocked |  |
0269 | ɩ | 0582 | ւ | ↔ | blocked |  |
0269 | ɩ | 1EC9 | ỉ | ↔ | blocked |  |
0390 | ΐ | 0390 | ΐ | ≡ | r-diac |  | Greek letter with diacritic
0390 | ΐ | 03AF | ί | ↔ | blocked |  | Diacritic variant
0390 | ΐ | 03B9 | ι | → | base |  | Base form variant
← | blocked |  | Diacritic variant
0390 | ΐ | 03CA | ϊ | ↔ | blocked |  | Diacritic variant
0390 | ΐ | 0456 | і | ↔ | blocked |  |
0390 | ΐ | 0457 | ї | ↔ | blocked |  |
0390 | ΐ | 0582 | ւ | ↔ | blocked |  |
0390 | ΐ | 1EC9 | ỉ | ↔ | blocked |  |
03AF | ί | 03AF | ί | ≡ | r-diac |  | Greek letter with diacritic
03AF | ί | 03B9 | ι | → | base |  | Base form variant
← | blocked |  | Diacritic variant
03AF | ί | 03CA | ϊ | ↔ | blocked |  | Diacritic variant
03AF | ί | 0456 | і | ↔ | blocked |  |
03AF | ί | 0457 | ї | ↔ | blocked |  |
03AF | ί | 0582 | ւ | ↔ | blocked |  |
03AF | ί | 1EC9 | ỉ | ↔ | blocked |  |
03B9 | ι | 03CA | ϊ | → | blocked |  | Diacritic variant
← | base |  | Base form variant
03B9 | ι | 0456 | і | ↔ | blocked |  | Cross-script near homoglyph
03B9 | ι | 0457 | ї | ↔ | blocked |  |
03B9 | ι | 0582 | ւ | ↔ | blocked |  | Cross-script near homoglyph
03B9 | ι | 1EC9 | ỉ | ↔ | blocked |  |
03CA | ϊ | 03CA | ϊ | ≡ | r-diac |  | Greek letter with diacritic
03CA | ϊ | 0456 | і | ↔ | blocked |  |
03CA | ϊ | 0457 | ї | ↔ | blocked |  | Cross-script homoglyph
03CA | ϊ | 0582 | ւ | ↔ | blocked |  |
03CA | ϊ | 1EC9 | ỉ | ↔ | blocked |  |
0456 | і | 0456 | і | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0456 | і | 0457 | ї | ↔ | blocked |  |
0456 | і | 0582 | ւ | ↔ | blocked |  |
0456 | і | 1EC9 | ỉ | ↔ | blocked |  |
0457 | ї | 0457 | ї | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0457 | ї | 0582 | ւ | ↔ | blocked |  |
0457 | ї | 1EC9 | ỉ | ↔ | blocked |  |
0582 | ւ | 0582 | ւ | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0582 | ւ | 1EC9 | ỉ | ↔ | blocked |  |
1EC9 | ỉ | 1EC9 | ỉ | ≡ | out-of-repertoire-var |  | Out-of-repertoire

### Variant Set 3 — 8 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
006E | n | 006E | n | ≡ | out-of-repertoire-var |  | Out-of-repertoire
006E | n | 0144 | ń | ↔ | blocked |  |
006E | n | 014B | ŋ | ↔ | blocked |  |
006E | n | 03AE | ή | ↔ | blocked |  |
006E | n | 03B7 | η | ↔ | blocked |  | Cross-script near homoglyph
006E | n | 0572 | ղ | ↔ | blocked |  |
006E | n | 0578 | ո | ↔ | blocked |  |
006E | n | 1E45 | ṅ | ↔ | blocked |  |
0144 | ń | 0144 | ń | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0144 | ń | 014B | ŋ | ↔ | blocked |  |
0144 | ń | 03AE | ή | ↔ | blocked |  | Cross-script near homoglyph
0144 | ń | 03B7 | η | ↔ | blocked |  |
0144 | ń | 0572 | ղ | ↔ | blocked |  |
0144 | ń | 0578 | ո | ↔ | blocked |  |
0144 | ń | 1E45 | ṅ | ↔ | blocked |  |
014B | ŋ | 014B | ŋ | ≡ | out-of-repertoire-var |  | Out-of-repertoire
014B | ŋ | 03AE | ή | ↔ | blocked |  |
014B | ŋ | 03B7 | η | ↔ | blocked |  | Cross-script near homoglyph
014B | ŋ | 0572 | ղ | ↔ | blocked |  |
014B | ŋ | 0578 | ո | ↔ | blocked |  |
014B | ŋ | 1E45 | ṅ | ↔ | blocked |  |
03AE | ή | 03AE | ή | ≡ | r-diac |  | Greek letter with diacritic
03AE | ή | 03B7 | η | → | base |  | Base form variant
← | blocked |  | Diacritic variant
03AE | ή | 0572 | ղ | ↔ | blocked |  |
03AE | ή | 0578 | ո | ↔ | blocked |  |
03AE | ή | 1E45 | ṅ | ↔ | blocked |  |
03B7 | η | 0572 | ղ | ↔ | blocked |  | Cross-script near homoglyph
03B7 | η | 0578 | ո | ↔ | blocked |  | Cross-script near homoglyph
03B7 | η | 1E45 | ṅ | ↔ | blocked |  |
0572 | ղ | 0572 | ղ | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0572 | ղ | 0578 | ո | ↔ | blocked |  |
0572 | ղ | 1E45 | ṅ | ↔ | blocked |  |
0578 | ո | 0578 | ո | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0578 | ո | 1E45 | ṅ | ↔ | blocked |  |
1E45 | ṅ | 1E45 | ṅ | ≡ | out-of-repertoire-var |  | Out-of-repertoire

### Variant Set 4 — 6 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
006F | o | 006F | o | ≡ | out-of-repertoire-var |  | Out-of-repertoire
006F | o | 00F3 | ó | ↔ | blocked |  |
006F | o | 03BF | ο | ↔ | blocked |  | Cross-script homoglyph
006F | o | 03CC | ό | ↔ | blocked |  |
006F | o | 043E | о | ↔ | blocked |  |
006F | o | 0585 | օ | ↔ | blocked |  |
00F3 | ó | 00F3 | ó | ≡ | out-of-repertoire-var |  | Out-of-repertoire
00F3 | ó | 03BF | ο | ↔ | blocked |  |
00F3 | ó | 03CC | ό | ↔ | blocked |  | Cross-script homoglyph
00F3 | ó | 043E | о | ↔ | blocked |  |
00F3 | ó | 0585 | օ | ↔ | blocked |  |
03BF | ο | 03CC | ό | → | blocked |  | Diacritic variant
← | base |  | Base form variant
03BF | ο | 043E | о | ↔ | blocked |  | Cross-script homoglyph
03BF | ο | 0585 | օ | ↔ | blocked |  | Cross-script homoglyph
03CC | ό | 03CC | ό | ≡ | r-diac |  | Greek letter with diacritic
03CC | ό | 043E | о | ↔ | blocked |  |
03CC | ό | 0585 | օ | ↔ | blocked |  |
043E | о | 043E | о | ≡ | out-of-repertoire-var |  | Out-of-repertoire
043E | о | 0585 | օ | ↔ | blocked |  |
0585 | օ | 0585 | օ | ≡ | out-of-repertoire-var |  | Out-of-repertoire

### Variant Set 5 — 3 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
0070 | p | 0070 | p | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0070 | p | 03C1 | ρ | ↔ | blocked |  | Cross-script near homoglyph
0070 | p | 0440 | р | ↔ | blocked |  |
03C1 | ρ | 0440 | р | ↔ | blocked |  | Cross-script near homoglyph
0440 | р | 0440 | р | ≡ | out-of-repertoire-var |  | Out-of-repertoire

### Variant Set 6 — 4 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
0073 0073 | ss | 0073 0073 | ss | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0073 0073 | ss | 00DF | ß | ↔ | blocked |  |
0073 0073 | ss | 03B2 | β | ↔ | blocked |  |
0073 0073 | ss | 0455 0455 | ѕѕ | ↔ | blocked |  |
00DF | ß | 00DF | ß | ≡ | out-of-repertoire-var |  | Out-of-repertoire
00DF | ß | 03B2 | β | ↔ | blocked |  | Cross-script near homoglyph
00DF | ß | 0455 0455 | ѕѕ | ↔ | blocked |  |
03B2 | β | 0455 0455 | ѕѕ | ↔ | blocked |  |
0455 0455 | ѕѕ | 0455 0455 | ѕѕ | ≡ | out-of-repertoire-var |  | Out-of-repertoire

### Variant Set 7 — 9 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
0075 | u | 0075 | u | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0075 | u | 00FA | ú | ↔ | blocked |  |
0075 | u | 00FC | ü | ↔ | blocked |  |
0075 | u | 028B | ʋ | ↔ | blocked |  |
0075 | u | 03B0 | ΰ | ↔ | blocked |  |
0075 | u | 03C5 | υ | ↔ | blocked |  | Cross-script near homoglyph
0075 | u | 03CB | ϋ | ↔ | blocked |  |
0075 | u | 03CD | ύ | ↔ | blocked |  |
0075 | u | 057D | ս | ↔ | blocked |  |
00FA | ú | 00FA | ú | ≡ | out-of-repertoire-var |  | Out-of-repertoire
00FA | ú | 00FC | ü | ↔ | blocked |  |
00FA | ú | 028B | ʋ | ↔ | blocked |  |
00FA | ú | 03B0 | ΰ | ↔ | blocked |  |
00FA | ú | 03C5 | υ | ↔ | blocked |  |
00FA | ú | 03CB | ϋ | ↔ | blocked |  |
00FA | ú | 03CD | ύ | ↔ | blocked |  | Cross-script near homoglyph
00FA | ú | 057D | ս | ↔ | blocked |  |
00FC | ü | 00FC | ü | ≡ | out-of-repertoire-var |  | Out-of-repertoire
00FC | ü | 028B | ʋ | ↔ | blocked |  |
00FC | ü | 03B0 | ΰ | ↔ | blocked |  |
00FC | ü | 03C5 | υ | ↔ | blocked |  |
00FC | ü | 03CB | ϋ | ↔ | blocked |  | Cross-script near homoglyph
00FC | ü | 03CD | ύ | ↔ | blocked |  |
00FC | ü | 057D | ս | ↔ | blocked |  |
028B | ʋ | 028B | ʋ | ≡ | out-of-repertoire-var |  | Out-of-repertoire
028B | ʋ | 03B0 | ΰ | ↔ | blocked |  |
028B | ʋ | 03C5 | υ | ↔ | blocked |  | Cross-script near homoglyph
028B | ʋ | 03CB | ϋ | ↔ | blocked |  |
028B | ʋ | 03CD | ύ | ↔ | blocked |  |
028B | ʋ | 057D | ս | ↔ | blocked |  |
03B0 | ΰ | 03B0 | ΰ | ≡ | r-diac |  | Greek letter with diacritic
03B0 | ΰ | 03C5 | υ | → | base |  | Base form variant
← | blocked |  | Diacritic variant
03B0 | ΰ | 03CB | ϋ | ↔ | blocked |  | Diacritic variant
03B0 | ΰ | 03CD | ύ | ↔ | blocked |  | Diacritic variant
03B0 | ΰ | 057D | ս | ↔ | blocked |  |
03C5 | υ | 03CB | ϋ | → | blocked |  | Diacritic variant
← | base |  | Base form variant
03C5 | υ | 03CD | ύ | → | blocked |  | Diacritic variant
← | base |  | Base form variant
03C5 | υ | 057D | ս | ↔ | blocked |  | Cross-script near homoglyph
03CB | ϋ | 03CB | ϋ | ≡ | r-diac |  | Greek letter with diacritic
03CB | ϋ | 03CD | ύ | ↔ | blocked |  | Diacritic variant
03CB | ϋ | 057D | ս | ↔ | blocked |  |
03CD | ύ | 03CD | ύ | ≡ | r-diac |  | Greek letter with diacritic
03CD | ύ | 057D | ս | ↔ | blocked |  |
057D | ս | 057D | ս | ≡ | out-of-repertoire-var |  | Out-of-repertoire

### Variant Set 8 — 2 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
0076 | v | 0076 | v | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0076 | v | 03BD | ν | ↔ | blocked |  | Cross-script near homoglyph

### Variant Set 9 — 5 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
0079 | y | 0079 | y | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0079 | y | 0263 | ɣ | ↔ | blocked |  |
0079 | y | 03B3 | γ | ↔ | blocked |  | Cross-script near homoglyph
0079 | y | 0443 | у | ↔ | blocked |  |
0079 | y | 04AF | ү | ↔ | blocked |  |
0263 | ɣ | 0263 | ɣ | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0263 | ɣ | 03B3 | γ | ↔ | blocked |  | Cross-script near homoglyph
0263 | ɣ | 0443 | у | ↔ | blocked |  |
0263 | ɣ | 04AF | ү | ↔ | blocked |  |
03B3 | γ | 0443 | у | ↔ | blocked |  | Cross-script near homoglyph
03B3 | γ | 04AF | ү | ↔ | blocked |  | Cross-script near homoglyph
0443 | у | 0443 | у | ≡ | out-of-repertoire-var |  | Out-of-repertoire
0443 | у | 04AF | ү | ↔ | blocked |  |
04AF | ү | 04AF | ү | ≡ | out-of-repertoire-var |  | Out-of-repertoire

### Variant Set 10 — 3 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
01A1 | ơ | 01A1 | ơ | ≡ | out-of-repertoire-var |  | Out-of-repertoire
01A1 | ơ | 03C2 | ς | ↔ | blocked |  |
01A1 | ơ | 03C3 | σ | ↔ | blocked |  | Cross-script near homoglyph
03C2 | ς | 03C2 | ς | ≡ | r-final |  | Final form
03C2 | ς | 03C3 | σ | → | nonfinal |  | Nominal form variant
← | blocked |  | Final form variant

### Variant Set 11 — 3 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
025B | ɛ | 025B | ɛ | ≡ | out-of-repertoire-var |  | Out-of-repertoire
025B | ɛ | 03AD | έ | ↔ | blocked |  |
025B | ɛ | 03B5 | ε | ↔ | blocked |  | Cross-script homoglyph
03AD | έ | 03AD | έ | ≡ | r-diac |  | Greek letter with diacritic
03AD | έ | 03B5 | ε | → | base |  | Base form variant
← | blocked |  | Diacritic variant

### Variant Set 12 — 2 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
03BA | κ | 043A | к | ↔ | blocked |  | Cross-script near homoglyph
043A | к | 043A | к | ≡ | out-of-repertoire-var |  | Out-of-repertoire

### Variant Set 13 — 2 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
03C4 | τ | 0442 | т | ↔ | blocked |  | Cross-script homoglyph
0442 | т | 0442 | т | ≡ | out-of-repertoire-var |  | Out-of-repertoire

### Variant Set 14 — 2 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
03C6 | φ | 0444 | ф | ↔ | blocked |  | Cross-script homoglyph
0444 | ф | 0444 | ф | ≡ | out-of-repertoire-var |  | Out-of-repertoire

### Variant Set 15 — 2 Members

Source | Glyph | Target | Glyph |  | Type | Ref | Comment
--- | --- | --- | --- | --- | --- | --- | ---
03C9 | ω | 03CE | ώ | → | blocked |  | Diacritic variant
← | base |  | Base form variant
03CE | ώ | 03CE | ώ | ≡ | r-diac |  | Greek letter with diacritic

# Classes, Rules and Actions

## Character Classes

Implict defined by script tag | 4

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
--- | --- | --- | --- | --- | ---
implicit | Tag=sc:Armn | 5 | {0572 0578 057D 0582 0585} |  | Any character tagged as Armenian
implicit | Tag=sc:Cyrl | 10 | {0430 043A 043E 0440 0442-0444 0456-0457 04AF} |  | Any character tagged as Cyrillic
implicit | Tag=sc:Grek | 36 | {0390 03AC-03CE} |  | Any character tagged as Greek
implicit | Tag=sc:Latn | 25 | {0061 0069 006E-0070 0075-0076 0079 00DF 00E1 00ED 00EF 00F3 00FA 00FC 0131 0144 014B 01A1 025B 0263 0269 028B 1E45 1EC9} |  | Any character tagged as Latin

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 and for which there is no named equivalent.

## Whole label evaluation and context rules

Number of rules | 1
Used to trigger actions | 1

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}]]]` | ✔ |  |  |  | Default WLE rule matching labels with leading combining marks ⍟

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:
start or end
  (start) matches the start of the label; (end) matches the end of the label.
[\p{ }] - property
  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.

## 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 |  | labels with leading combining marks are invalid ⍟
2 | if at least one variant is in | {out-of-repertoire-var} | → | invalid |  | any variant label with a code point out of repertoire is invalid ⍟
3 | if at least one variant is in | {blocked} | → | blocked |  | any variant label containing blocked variants is blocked ⍟
4 | if each variant is in | {r-diac r-final} | → | valid |  | any remaining label containing only original code points is valid
5 | if each variant is in | {base nonfinal} | → | allocatable |  | any label with all unaccented vowels and all standard sigmas is allocatable
6 | if each variant is in | {base r-final} | → | allocatable |  | any label with all unaccented vowels and sigmas as applied for is allocatable
7 | if each variant is in | {r-diac nonfinal} | → | allocatable |  | any label with all vowels as applied for and all standard sigmas is allocatable
8 | if at least one variant is in | {base nonfinal} | → | blocked |  | any variant label with a mix of vowel accents or sigma forms is blocked
9 | if each variant is in | {allocatable} | → | allocatable |  | variant labels with all variants allocatable are allocatable ⍟
10 | 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.

# 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
[101] | Wikipedia, “Greek Alphabet”, https://en.wikipedia.org/wiki/Greek_alphabet