Root Zone LGR for script: Greek (Grek) rz-lgr-6-greek-script-23sep25-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 2025-09-23
LGR Version 6 (Root Zone Label Generation Rules for the Greek Script)
Language und-Grek (Greek Script)
Scope domain: "." (Root)
Unicode Version 16.0.0

Description

Root Zone Label Generation Rules for the Greek Script

Overview

This file contains a set of 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-6]. 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 contained in [MSR-6], which is a subset of [Unicode 16.0.0].

Note: No Greek code points from MSR-6 have been excluded.

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

Repertoire Listing: Each code point or range is tagged with the script or scripts with which the code point is used. For each repertoire element, one or more references document sufficient justification for inclusion in the repertoire; see the “References” below.

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

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 6.2 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.

Additional Cross-script Variants

Where homoglyphs or near homoglyphs exist between the Latin, Greek, Cyrillic and Armenian scripts, out-of-repertoire variants are defined with a comment “Cross-script homoglyph” or “Cross-script near homoglyph” respectively. As result of integration, including the effects of cross-script transitivity, the number of cross-script variants listed for these scripts may be larger than defined in Section 6, “Variants” in [Proposal-Greek]. These are generally not marked.

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 closely related scripts Armenian, Cyrillic, Greek and Latin are listed in full. See the merged, Common LGR [RZ-LGR-6] 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.

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

The specification of variants in the Root Zone LGR follows the guidelines in [RFC 8228].

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-6]. They are marked with ⍟. The actions compute a label disposition based on WLE rules or variant mapping types.

Greek specific Rules

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

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. For details on methodology and contributors, see Sections 4 and 8 in [Proposal-Greek], as well as [RZ-LGR-6-Overview].

References

The following general references are cited in this document:

[MSR-6]
Integration Panel, “Maximal Starting Repertoire — MSR-6 Overview and Rationale”, 23 September 2025,
https://www.icann.org/en/system/files/files/msr-6-overview-23sep25-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-6-Overview]
Integration Panel, “Root Zone Label Generation Rules (RZ LGR-6): Overview and Summary”, 23 September 2025,
https://www.icann.org/sites/default/files/lgr/rz-lgr-6-overview-23sep25-en.pdf
[RZ-LGR-6]
Integration Panel, “Root Zone Label Generation Rules (RZ-LGR-6)”, 23 September 2025 (XML),
https://www.icann.org/sites/default/files/lgr/rz-lgr-6-common-23sep25-en.xml
non-normative HTML presentation:
https://www.icann.org/sites/default/files/lgr/rz-lgr-6-common-23sep25-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 16.0.0]
The Unicode Consortium. The Unicode Standard, Version 16.0.0, (South San Francisco: The Unicode Consortium, 2024. ISBN 978-1-936213-34-4)
https://www.unicode.org/versions/Unicode16.0.0/

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. Entries in the table 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 document, 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.

Variants

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

Variant Sets

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 variant mappings between out-of-repertoire code points are shown in italic while types for pure in-repertoire variant mappings 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

Implicit 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.

Note: The following variant types are used in one or more actions, but are not defined in this LGR: allocatable. This is not necessarily an error.

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, Version 1.1
Any code point originally encoded in Unicode Version 1.1
[101] Wikipedia, “Greek Alphabet”,
https://en.wikipedia.org/wiki/Greek_alphabet