Kannada
Root Zone Label Generation Rules, 3rd Edition
Summary
| Version | 3 — Root Zone LGR for Kannada |
|---|---|
| Date | |
| Tag |
und-Knda (Kannada)
|
| Unicode | 6.3.0 |
| Scope | DNS root zone |
| Source file | lgr-3-kannada-script-10jul19-en.xml (25.4kb) |
Description
Root Zone Label Generation Rules for the Kannada Script
Overview
This file contains Label Generation Rules (LGR) for the Kannada script for the Root Zone. For more details on this LGR and its development, see "Proposal for a Kannada Script Root Zone Label Generation Ruleset (LGR)" [Proposal]. This file is one of a set of LGR files that together form an integrated LGR for the DNS Root Zone [RZ-LGR-3]. The format of this file follows [RFC 7940].
Repertoire
According to Section 5, "Repertoire" in [Proposal], the Kannada LGR contains 62 unique code points.
This LGR caters to Kannada, Tulu, Beary, Konkani, Havyaka, Kodava, among other languages written using the Kannada script.
Read the rest of the description Show less
The repertoire is based on [MSR-4], which is a subset of [Unicode 6.3].
Code points outside the Kannada 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.
Each code point is tagged with the script or scripts that the code point is used with, a category value, and one or more references documenting sufficient justification for inclusion in the repertoire, see "References" below. Comments provide alternate names for some code points.
Variants
According to Section 6, "Variants", in [Proposal], this LGR defines cross-script variants which are "Confusing due to deviation from normally perceived character formations by larger linguistic community". These cases are not of mere visual similarity; they can cause confusion even to a careful observer and hence have been defined as variants. There are no in-script variants defined for Kannada.
Variant Disposition: All variants are of type "blocked" making labels that differ only by these variants mutually exclusive: whichever label containing either of these variants is chosen earlier would be delegated, while any other equivalent variant label should be blocked. There is no preference among these variants.
This LGR does not define allocatable variants.
The specification of variants in the Root Zone LGR follows the guidelines in [RFC 8228].
Character Classes
The structure of the Kannada script is similar to that of other Indian scripts; it is particularly closely related to Telugu. The heart of the writing system is the Akshar. The Kannada script is known as aksharamale or varnamale. The basic characters are classified into three main categories: swara (vowels), vyanjana (consonants) and yogavahas (semiconsonants).
Swaras (vowels): There are thirteen vowels. When a vowel follows a consonant, it is written with a diacritic rather than as a separate letter. Sometimes these are referred to as vowel signs or matras. More details in Section 3.4.1, "Swaras (vowels)" in [Proposal].
Yogavahas (semiconsonants ): The Yōgavāha (part-vowel, part consonant) include two letters:
- The anusvara: ಅಂ /aṁ/.
- The visarga: ಅಃ /aḥ/.
See Section 3.4.2, "Yogavahas" of the [Proposal].
Vyanjanas (consonants): Two categories of consonant characters are defined in Kannada: the structured consonants (vargeeya vyanjana) and the unstructured consonants (avargeeya vyanjana). For the purpose of this LGR, all consonants are treated the same. More details in Section 3.4.3, "Vyanjanas (consonants)" of the [Proposal].
Implicit vowel ಅ (a) in consonants: All consonant code points in Kannada contain an implicit an vowel ಅ (a). The Unicode character U+0CCD, which is the Kannada equivalent of the Devanagari Halant (or Virama), U+094D, is applied to consonants to remove the implicit ಅ (a). More details in Section 3.4.4, "Implicit vowel ಅ (a) in consonants" in [Proposal].
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-4]. They are marked with ⍟. The default prohibition on leading combining marks is equivalent to ensuring that a label only starts with a consonant or vowel.
Kannada-specific Rules
These rules have been formulated so that they can be adopted for LGR specification.
The following symbols are used in the WLE rules:
C → Consonant
M → Matra
V → Vowel
B → Anusvara
X → Visarga
H → Halant / Virama
The rules are:
- 1. H: must be preceded by C
- 2. M: must be preceded by C
- 3. B: must be preceded by C, V or M
- 4. X: must be preceded by C, V or M
- 5. V: cannot be preceded by H
More details in Section 7, "Whole Label Evaluation Rules (WLE)" of [Proposal].
Methodology and Contributors
The LGR for the Kannada script was developed by the Neo-Brahmi Generation Panel (NBGP) the members of which have experience in linguistics and computational linguistics in a wide variety of languages written with Neo-Brahmi scripts. Under the Neo-Brahmi Generation Panel, there are nine scripts belonging to separate Unicode blocks. Each of these scripts has been assigned a separate LGR, with the Neo-Brahmi GP ensuring that the fundamental philosophy behind building each LGR is in sync with all other Brahmi derived scripts. For further details on methodology and contributors, see Sections 4 and 8 in [Proposal], as well as [RZ-LGR-3-Overview].
References
The following general references are cited in this document:
- [MSR-4]
- Integration Panel, "Maximal Starting Repertoire — MSR-4 Overview and Rationale", 7 February 2019, https://www.icann.org/en/system/files/files/msr-4-overview-25jan19-en.pdf
- [Proposal]
- Neo-Brahmi Generation Panel, “Proposal for a Kannada Script Root Zone Label Generation Ruleset (LGR)”, 6 March 2019, https://www.icann.org/en/system/files/files/proposal-kannada-lgr-06mar19-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
- [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
- [RZ-LGR-3-Overview]
- Integration Panel, "Root Zone Label Generation Rules - LGR-3: Overview and Summary", 10 July 2019 (PDF), https://www.icann.org/sites/default/files/lgr/lgr-3-overview-10jul19-en.pdf
- [RZ-LGR-3]
- Integration Panel, "Label Generation Rules for the Root Zone — LGR-3", 10 July 2019 (XML), https://www.icann.org/sites/default/files/lgr/lgr-3-common-10jul19-en.xml
non-normative HTML presentation: https://www.icann.org/sites/default/files/lgr/lgr-3-common-10jul19-en.html - [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/
Repertoire
| Glyph | Code point | Tags and context | Variants |
|---|---|---|---|
| ం | U+0C02 TELUGU SIGN ANUSVARA Not part of repertoire |
|
ಂ
U+0C82
blocked
Cross-script homoglyph
|
| ః | U+0C03 TELUGU SIGN VISARGA Not part of repertoire |
|
ಃ
U+0C83
blocked
Cross-script homoglyph
|
| అ | U+0C05 TELUGU LETTER A Not part of repertoire |
|
ಅ
U+0C85
blocked
Cross-script homoglyph
|
| ఆ | U+0C06 TELUGU LETTER AA Not part of repertoire |
|
ಆ
U+0C86
blocked
Cross-script homoglyph
|
| ఇ | U+0C07 TELUGU LETTER I Not part of repertoire |
|
ಇ
U+0C87
blocked
Cross-script homoglyph
|
| ఈ | U+0C08 TELUGU LETTER II Not part of repertoire |
|
ಈ
U+0C88
blocked
Cross-script homoglyph
|
| ఐ | U+0C10 TELUGU LETTER AI Not part of repertoire |
|
ಐ
U+0C90
blocked
Cross-script homoglyph
|
| ఒ | U+0C12 TELUGU LETTER O Not part of repertoire |
|
ಒ
U+0C92
blocked
Cross-script homoglyph
|
| ఓ | U+0C13 TELUGU LETTER OO Not part of repertoire |
|
ಓ
U+0C93
blocked
Cross-script homoglyph
|
| ఔ | U+0C14 TELUGU LETTER AU Not part of repertoire |
|
ಔ
U+0C94
blocked
Cross-script homoglyph
|
| ఖ | U+0C16 TELUGU LETTER KHA Not part of repertoire |
|
ಖ
U+0C96
blocked
Cross-script homoglyph
|
| గ | U+0C17 TELUGU LETTER GA Not part of repertoire |
|
ಗ
U+0C97
blocked
Cross-script homoglyph
|
| జ | U+0C1C TELUGU LETTER JA Not part of repertoire |
|
ಜ
U+0C9C
blocked
Cross-script homoglyph
|
| ఝ | U+0C1D TELUGU LETTER JHA Not part of repertoire |
|
ಝ
U+0C9D
blocked
Cross-script homoglyph
|
| ఞ | U+0C1E TELUGU LETTER NYA Not part of repertoire |
|
ಞ
U+0C9E
blocked
Cross-script homoglyph
|
| ట | U+0C1F TELUGU LETTER TTA Not part of repertoire |
|
ಟ
U+0C9F
blocked
Cross-script homoglyph
|
| ఠ | U+0C20 TELUGU LETTER TTHA Not part of repertoire |
|
ಠ
U+0CA0
blocked
Cross-script homoglyph
|
| డ | U+0C21 TELUGU LETTER DDA Not part of repertoire |
|
ಡ
U+0CA1
blocked
Cross-script homoglyph
|
| ఢ | U+0C22 TELUGU LETTER DDHA Not part of repertoire |
|
ಢ
U+0CA2
blocked
Cross-script homoglyph
|
| ణ | U+0C23 TELUGU LETTER NNA Not part of repertoire |
|
ಣ
U+0CA3
blocked
Cross-script homoglyph
|
| థ | U+0C25 TELUGU LETTER THA Not part of repertoire |
|
ಥ
U+0CA5
blocked
Cross-script homoglyph
|
| ద | U+0C26 TELUGU LETTER DA Not part of repertoire |
|
ದ
U+0CA6
blocked
Cross-script homoglyph
|
| ధ | U+0C27 TELUGU LETTER DHA Not part of repertoire |
|
ಧ
U+0CA7
blocked
Cross-script homoglyph
|
| న | U+0C28 TELUGU LETTER NA Not part of repertoire |
|
ನ
U+0CA8
blocked
Cross-script homoglyph
|
| బ | U+0C2C TELUGU LETTER BA Not part of repertoire |
|
ಬ
U+0CAC
blocked
Cross-script homoglyph
|
| భ | U+0C2D TELUGU LETTER BHA Not part of repertoire |
|
ಭ
U+0CAD
blocked
Cross-script homoglyph
|
| మ | U+0C2E TELUGU LETTER MA Not part of repertoire |
|
ಮ
U+0CAE
blocked
Cross-script homoglyph
|
| య | U+0C2F TELUGU LETTER YA Not part of repertoire |
|
ಯ
U+0CAF
blocked
Cross-script homoglyph
|
| ర | U+0C30 TELUGU LETTER RA Not part of repertoire |
|
ರ
U+0CB0
blocked
Cross-script homoglyph
|
| ల | U+0C32 TELUGU LETTER LA Not part of repertoire |
|
ಲ
U+0CB2
blocked
Cross-script homoglyph
|
| ళ | U+0C33 TELUGU LETTER LLA Not part of repertoire |
|
ಳ
U+0CB3
blocked
Cross-script homoglyph
|
| ి | U+0C3F TELUGU VOWEL SIGN I Not part of repertoire |
|
ಿ
U+0CBF
blocked
Cross-script homoglyph
|
| ు | U+0C41 TELUGU VOWEL SIGN U Not part of repertoire |
|
ು
U+0CC1
blocked
Cross-script homoglyph
|
| ృ | U+0C43 TELUGU VOWEL SIGN VOCALIC R Not part of repertoire |
|
ೃ
U+0CC3
blocked
Cross-script homoglyph
|
| ಂ | U+0C82 KANNADA SIGN ANUSVARA 110 |
|
ం
U+0C02
blocked
Cross-script homoglyph
|
| ಃ | U+0C83 KANNADA SIGN VISARGA 110 |
|
ః
U+0C03
blocked
Cross-script homoglyph
|
| ಅ | U+0C85 KANNADA LETTER A 110 |
|
అ
U+0C05
blocked
Cross-script homoglyph
|
| ಆ | U+0C86 KANNADA LETTER AA 110 |
|
ఆ
U+0C06
blocked
Cross-script homoglyph
|
| ಇ | U+0C87 KANNADA LETTER I 110 |
|
ఇ
U+0C07
blocked
Cross-script homoglyph
|
| ಈ | U+0C88 KANNADA LETTER II 110 |
|
ఈ
U+0C08
blocked
Cross-script homoglyph
|
| ಉ | U+0C89 KANNADA LETTER U 110 |
|
|
| ಊ | U+0C8A KANNADA LETTER UU 110 |
|
|
| ಋ | U+0C8B KANNADA LETTER VOCALIC R 110 |
|
|
| ಎ | U+0C8E KANNADA LETTER E 110 |
|
|
| ಏ | U+0C8F KANNADA LETTER EE 110 |
|
|
| ಐ | U+0C90 KANNADA LETTER AI 110 |
|
ఐ
U+0C10
blocked
Cross-script homoglyph
|
| ಒ | U+0C92 KANNADA LETTER O 110 |
|
ఒ
U+0C12
blocked
Cross-script homoglyph
|
| ಓ | U+0C93 KANNADA LETTER OO 110 |
|
ఓ
U+0C13
blocked
Cross-script homoglyph
|
| ಔ | U+0C94 KANNADA LETTER AU 110 |
|
ఔ
U+0C14
blocked
Cross-script homoglyph
|
| ಕ | U+0C95 KANNADA LETTER KA 110 |
|
|
| ಖ | U+0C96 KANNADA LETTER KHA 110 |
|
ఖ
U+0C16
blocked
Cross-script homoglyph
|
| ಗ | U+0C97 KANNADA LETTER GA 110 |
|
గ
U+0C17
blocked
Cross-script homoglyph
|
| ಘ | U+0C98 KANNADA LETTER GHA 110 |
|
|
| ಙ | U+0C99 KANNADA LETTER NGA 110 |
|
|
| ಚ | U+0C9A KANNADA LETTER CA 110 |
|
|
| ಛ | U+0C9B KANNADA LETTER CHA 110 |
|
|
| ಜ | U+0C9C KANNADA LETTER JA 110 |
|
జ
U+0C1C
blocked
Cross-script homoglyph
|
| ಝ | U+0C9D KANNADA LETTER JHA 110 |
|
ఝ
U+0C1D
blocked
Cross-script homoglyph
|
| ಞ | U+0C9E KANNADA LETTER NYA 110 |
|
ఞ
U+0C1E
blocked
Cross-script homoglyph
|
| ಟ | U+0C9F KANNADA LETTER TTA 110 |
|
ట
U+0C1F
blocked
Cross-script homoglyph
|
| ಠ | U+0CA0 KANNADA LETTER TTHA 110 |
|
ఠ
U+0C20
blocked
Cross-script homoglyph
|
| ಡ | U+0CA1 KANNADA LETTER DDA 110 |
|
డ
U+0C21
blocked
Cross-script homoglyph
|
| ಢ | U+0CA2 KANNADA LETTER DDHA 110 |
|
ఢ
U+0C22
blocked
Cross-script homoglyph
|
| ಣ | U+0CA3 KANNADA LETTER NNA 110 |
|
ణ
U+0C23
blocked
Cross-script homoglyph
|
| ತ | U+0CA4 KANNADA LETTER TA 110 |
|
|
| ಥ | U+0CA5 KANNADA LETTER THA 110 |
|
థ
U+0C25
blocked
Cross-script homoglyph
|
| ದ | U+0CA6 KANNADA LETTER DA 110 |
|
ద
U+0C26
blocked
Cross-script homoglyph
|
| ಧ | U+0CA7 KANNADA LETTER DHA 110 |
|
ధ
U+0C27
blocked
Cross-script homoglyph
|
| ನ | U+0CA8 KANNADA LETTER NA 110 |
|
న
U+0C28
blocked
Cross-script homoglyph
|
| ಪ | U+0CAA KANNADA LETTER PA 110 |
|
|
| ಫ | U+0CAB KANNADA LETTER PHA 110 |
|
|
| ಬ | U+0CAC KANNADA LETTER BA 110 |
|
బ
U+0C2C
blocked
Cross-script homoglyph
|
| ಭ | U+0CAD KANNADA LETTER BHA 110 |
|
భ
U+0C2D
blocked
Cross-script homoglyph
|
| ಮ | U+0CAE KANNADA LETTER MA 110 |
|
మ
U+0C2E
blocked
Cross-script homoglyph
|
| ಯ | U+0CAF KANNADA LETTER YA 110 |
|
య
U+0C2F
blocked
Cross-script homoglyph
|
| ರ | U+0CB0 KANNADA LETTER RA 110 |
|
ర
U+0C30
blocked
Cross-script homoglyph
|
| ಲ | U+0CB2 KANNADA LETTER LA 110 |
|
ల
U+0C32
blocked
Cross-script homoglyph
|
| ಳ | U+0CB3 KANNADA LETTER LLA 110 |
|
ళ
U+0C33
blocked
Cross-script homoglyph
|
| ವ | U+0CB5 KANNADA LETTER VA 110 |
|
|
| ಶ | U+0CB6 KANNADA LETTER SHA 110 |
|
|
| ಷ | U+0CB7 KANNADA LETTER SSA 110 |
|
|
| ಸ | U+0CB8 KANNADA LETTER SA 110 |
|
|
| ಹ | U+0CB9 KANNADA LETTER HA 110 |
|
|
| ಾ | U+0CBE KANNADA VOWEL SIGN AA 110 |
|
|
| ಿ | U+0CBF KANNADA VOWEL SIGN I 110 |
|
ి
U+0C3F
blocked
Cross-script homoglyph
|
| ೀ | U+0CC0 KANNADA VOWEL SIGN II 110 |
|
|
| ು | U+0CC1 KANNADA VOWEL SIGN U 110 |
|
ు
U+0C41
blocked
Cross-script homoglyph
|
| ೂ | U+0CC2 KANNADA VOWEL SIGN UU 110 |
|
|
| ೃ | U+0CC3 KANNADA VOWEL SIGN VOCALIC R 110 |
|
ృ
U+0C43
blocked
Cross-script homoglyph
|
| ೆ | U+0CC6 KANNADA VOWEL SIGN E 110 |
|
|
| ೇ | U+0CC7 KANNADA VOWEL SIGN EE 110 |
|
|
| ೈ | U+0CC8 KANNADA VOWEL SIGN AI 110 |
|
|
| ೊ | U+0CCA KANNADA VOWEL SIGN O 110 |
|
|
| ೋ | U+0CCB KANNADA VOWEL SIGN OO 110 |
|
|
| ೌ | U+0CCC KANNADA VOWEL SIGN AU 110 |
|
|
| ್ | U+0CCD KANNADA SIGN VIRAMA 110 = Halant |
|
Variants
Code points grouped into sets of mutual variants. Every member of a set produces the same set of variant labels, so a registration of one has implications for all the others. Sets of a single member are omitted, as are the identity mappings RFC 7940 requires each member to declare.
Character classes
Named sets of code points that the rules below refer to.
| Name | Definition |
|---|---|
C |
{tag Consonant}
110
Any Kannada consonant
|
V |
{tag Vowel}
110
Any Kannada independent vowel
|
M |
{tag Matra}
110
Any Kannada vowel sign (matra)
|
H |
{tag Halant}
110
The Kannada Halant / Virama)
|
Rules
Conditions evaluated against a whole label, or against the context around a
single code point. The notation borrows from regular expressions:
^ and $ anchor to the start and end of a label,
. matches any code point, (?= ) and
(?<= ) look ahead and behind, and * and
+ repeat. Two symbols are specific to rulesets:
◆ is the code point being tested, and
⟨name⟩ refers to another rule.
leading-combining-mark MSR default
Default WLE rule matching labels with leading combining marks
^ ({gc:Mn} ∪ {gc:Mc})
Structure
-
^start -
({gc:Mn} ∪ {gc:Mc})union-
{gc:Mn}class -
{gc:Mc}class
-
Referenced by 1 definition
- action 1 (invalid)
follows-C
Section 7, WLE 1: H must be preceded by C; WLE 2: M must be preceded by C
(?<= {C} ) ◆
Structure
-
(?<= {C} )look-behind-
{C}class
-
-
◆anchor
Referenced by 13 definitions
- context of U+0CBE
- context of U+0CBF
- context of U+0CC0
- context of U+0CC1
- context of U+0CC2
- context of U+0CC3
- context of U+0CC6
- context of U+0CC7
- context of U+0CC8
- context of U+0CCA
- context of U+0CCB
- context of U+0CCC
follows-C-V-or-M
Section 7, WLE 3: Anusvara must be preceded by C, V or M; WLE 4: Visarga must be preceded by C, V or M
(?<= ( {C} │ {V} │ {M} ) ) ◆
Structure
-
(?<= ( {C} │ {V} │ {M} ) )look-behind-
( {C} │ {V} │ {M} )choice-
{C}class -
{V}class -
{M}class
-
-
-
◆anchor
Referenced by 2 definitions
- context of U+0C82
- context of U+0C83
follows-H
Section 7, WLE 5: V cannot be preceded by H
(?<= {H} ) ◆
Structure
-
(?<= {H} )look-behind-
{H}class
-
-
◆anchor
Referenced by 13 definitions
- negative context of U+0C85
- negative context of U+0C86
- negative context of U+0C87
- negative context of U+0C88
- negative context of U+0C89
- negative context of U+0C8A
- negative context of U+0C8B
- negative context of U+0C8E
- negative context of U+0C8F
- negative context of U+0C90
- negative context of U+0C92
- negative context of U+0C93
Actions
Actions are evaluated in the order shown. The first action whose conditions match determines the disposition of the label.
| # | Disposition | Conditions |
|---|---|---|
| 1 |
invalid
|
label matches leading-combining-mark labels with leading combining marks are invalid MSR default |
| 2 |
invalid
|
any variant is out-of-repertoire-var any variant label with a code point out of repertoire is invalid MSR default |
| 3 |
blocked
|
any variant is blocked any variant label containing blocked variants is blocked MSR default |
| 4 |
allocatable
|
all variants are allocatable variant labels with all variants allocatable are allocatable MSR default |
| 5 |
valid
|
any label default catch all (default action) MSR default |
References
| Ref | Source |
|---|---|
| 110 | ಕನ್ನಡ ಮಧ್ಯಮ ವ್ಯಾಕರಣ, ತೀ.ನಂ. ಶ್ರೀಕಂಠಯ್ಯ, ಗೀತಾ ಬುಕ್ ಹೌಸ್, ಮೈಸೂರು, ೨೦೦೧ /Kannada Madhyama Vyakarana/ (An Intermediate Kannada Grammar), T. N. Sreekantaiya, Geetha Book House, Mysore, 2001. |