Root Zone LGR for script: Bengali (Beng) | rz-lgr-5-bengali-script-26may22-en |
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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 |
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LGR Version | 5 (Root Zone LGR for the Bengali (Bangla) Script) |
Language | und-Beng (Bengali Script) |
Scope | domain: "." (Root) |
Unicode Version | 11.0.0 |
This file contains Label Generation Rules (LGR) for the Bengali (Bangla) script for the Root Zone. This LGR covers Assamese, Bengali, Manipuri and a number of other languages written with the Bengali script. For more details on this LGR and additional background on the script, see “Proposal for a Bengali Script Root Zone Label Generation Ruleset (LGR)” [Proposal-Bengali]. 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].
The repertoire contains 61 code points for letters, as well as 9 code point sequences, for a total of 70 repertoire elements. Out of the nine sequences: two sequences override a WLE constraint; four sequences were defined for in-script variants; and the other three sequences were defined to restrict U+09BC ( ়) NUKTA from appearing in any context other than these sequences. Accordingly, while U+09BC ( ়) is not listed by itself, it brings the total of distinct code points to 62. For more detail, see Section 5, “Repertoire” in [Proposal-Bengali].
The repertoire is based on [MSR-5], which is a subset of [Unicode 11.0].
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 point is used, one or more other character categories, and one or more references documenting sufficient justification for inclusion in the repertoire; see “References” below. For code points that are part of the repertoire, comments identify the languages using the code point along with their [EGIDS] level.
Code points outside the Bengali 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.
This LGR defines in-script variants and cross-script variants as described in Section 6, “Variants”, in [Proposal-Bengali]. There are three in-script variants; two sequence sets and one set for variation of RA. See Section 6.1 of [Proposal-Bengali]. There are four cross-script variants; two sets with Gurmukhi and the other two sets with Devanagari. See Section 6.2 of [Proposal-Bengali].
Variant Disposition: The in-script variant pair U+09B0 (র) / U+09F0 (ৰ) is of type “allocatable”, thus allowing access to either user community. All other 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, the other one equivalent variant label should be blocked. There is no preference among these variants.
The specification of variants in the Root Zone LGR follows the guidelines in [RFC 8228].
Consonants: All consonants contain an implicit vowel. More details in Section 3.3.1, “The Consonants” of [Proposal-Bengali].
Hasanta: A special sign is needed whenever the implicit vowel in the preceding consonant is stripped off. This symbol is also known as the Halant or “Virama”. More details in Section 3.3.2, “The Implicit Vowel Killer: Hasanta” of [Proposal-Bengali].
Vowels and Kar (Matra): Separate symbols exist for all “Swara” or Vowels in Bengali, which are pronounced independently either at the beginning of the word or after another vowel or consonant sound. To indicate a Vowel sound other than the implicit one, a Vowel sign (Kar) is attached to the consonant, analogous to Matra in other Neo-Brahmi scripts.. More details in Section 3.3.3, “ Vowels” of [Proposal-Bengali].
Anusvara: The Anusvara represents a homorganic nasal. It replaces a conjunct group of a Nasal Consonant+Halant+Consonant belonging to that particular barga or set. Before a non-barga consonant, the anusvara represents a nasal sound. More details in Section 3.3.4, “The Anusvara” of [Proposal-Bengali].
Candrabindu: Candrabindu denotes nasalization of the preceding vowel as in চাঁদ /cãd/ “moon” (U+099A U+09BE U+0981 U+09A6). This sign with a dot inside the half-moon mark is used as nasalization marker in many Indian scripts. More details in Section 3.3.5, “Nasalization: Candrabindu” of [Proposal-Bengali].
Visarga and Avagraha: The Visarga U+0983 ( ঃ) is frequently used in Bengali loanwords borrowed from Sanskrit and represents a sound very close to /h/. More details in Section 3.3.7, “Visarga and Avagraha” of [Proposal-Bengali].
Ya-phala: There are two instances in Bangla where a Hasanta is preceded by a full vowel (U+0985 (অ) BENGALI LETTER A and U+098F (এ) BENGALI LETTER E). More details in Section 3.3.9, “Use of Ya-phala” of [Proposal-Bengali].
Ra-phala and Ref Sequences: RA+Hasanta (Repha or Ra-phala sequences). More details in Section 3.3.10, “Ra-phala and Ref Sequences” of [Proposal-Bengali].
Nukta: Nukta is not listed by itself in the repertoire; it is only included in three sequences. More details in Section 3.3.6, “Nukta” of [Proposal-Bengali].
Zero Width Non-joiner (ZWNJ) and Zero Width Joiner (ZWJ): These are not included in the repertoire. More details in Section 3.3.8, “Zero Width Non-joiner (U+200C) and Zero Width Joiner (U+200D)” of [Proposal-Bengali].
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 ⍟. The default prohibition on leading combining marks is equivalent to ensuring that a label only starts with a consonant or vowel.
These rules have been formulated as context rules suitable for adoption into an LGR specification.
The following symbols are used in the WLE rules:
The rules are:
More details in Section 7, “Whole Label Evaluation Rules (WLE)” of [Proposal-Bengali].
The Root Zone LGR for the Bengali 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-Bengali], as well as [RZ-LGR-5-Overview].
The following general references are cited in this document:
For references consulted particularly in designing the repertoire for the Bengali script for the Root Zone please see details in the Table of References below. References [0] and [7] refer to the Unicode Standard versions in which the corresponding code points were initially encoded. References [101] and above correspond to sources given in [Proposal-Bengali] justifying the inclusion of the corresponding code points. Entries in the table may have multiple source reference values.
Number of elements in repertoire | 70 | ||||||
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Out-of-repertoire variants | 4 | ||||||
Total entries in table | 74 | ||||||
Number of code points for each script |
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Number of code points | 65 | ||||||
Number of sequences | 9 | ||||||
Longest code point sequence | 4 | ||||||
Code points defined via sequence | 1 |
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.
Some code points that may be part of a valid label under this LGR only occur as part of one or more sequences. Such code points are not listed individually in the table.
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 | Tags | Required Context | Part of Repertoire |
Variants | Comment |
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U+092E | म | Devanagari | DEVANAGARI LETTER MA | [0] | ✗ | set 1 | Not part of repertoire | ||
U+093F | ि | Devanagari | DEVANAGARI VOWEL SIGN I | [0] | ✗ | set 2 | Not part of repertoire | ||
U+0981 | ঁ | Bengali | BENGALI SIGN CANDRABINDU | [0], [101], [102], [103] | Candrabindu | follows-only-V-C-M | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+0982 | ং | Bengali | BENGALI SIGN ANUSVARA | [0], [101], [102], [103] | Anusvara | follows-only-V-C-M-D | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+0983 | ঃ | Bengali | BENGALI SIGN VISARGA | [0], [101], [102], [103] | Visarga | follows-only-V-C-M-D | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+0985 | অ | Bengali | BENGALI LETTER A | [0], [101], [102], [103] | Vowel | not: follows-H | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+0985 U+09CD U+09AF U+09BE | অ্যা | {Bengali} | BENGALI LETTER A + BENGALI SIGN VIRAMA + BENGALI LETTER YA + BENGALI VOWEL SIGN AA | [Vowel] + [Halant] + [Consonant] + [Matra] | not: follows-H | ✔ | Ya-Phalaa (s1): Bangla (1), Assamese (2) | ||
U+0986 | আ | Bengali | BENGALI LETTER AA | [0], [101], [102], [103] | Vowel | not: follows-H | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+0987 | ই | Bengali | BENGALI LETTER I | [0], [101], [102], [103] | Vowel | not: follows-H | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+0988 | ঈ | Bengali | BENGALI LETTER II | [0], [101], [102], [103] | Vowel | not: follows-H | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+0989 | উ | Bengali | BENGALI LETTER U | [0], [101], [102], [103] | Vowel | not: follows-H | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+098A | ঊ | Bengali | BENGALI LETTER UU | [0], [101], [102], [103] | Vowel | not: follows-H | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+098B | ঋ | Bengali | BENGALI LETTER VOCALIC R | [0], [101], [102], [103] | Vowel | not: follows-H | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+098F | এ | Bengali | BENGALI LETTER E | [0], [101], [102], [103] | Vowel | not: follows-H | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+098F U+09CD U+09AF U+09BE | এ্যা | {Bengali} | BENGALI LETTER E + BENGALI SIGN VIRAMA + BENGALI LETTER YA + BENGALI VOWEL SIGN AA | [Vowel] + [Halant] + [Consonant] + [Matra] | not: follows-H | ✔ | Ya-Phalaa (s2): Bangla (1) | ||
U+0990 | ঐ | Bengali | BENGALI LETTER AI | [0], [101], [102], [103] | Vowel | not: follows-H | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+0993 | ও | Bengali | BENGALI LETTER O | [0], [101], [102], [103] | Vowel | not: follows-H | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+0994 | ঔ | Bengali | BENGALI LETTER AU | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+0995 | ক | Bengali | BENGALI LETTER KA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+0996 | খ | Bengali | BENGALI LETTER KHA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+0997 | গ | Bengali | BENGALI LETTER GA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+0998 | ঘ | Bengali | BENGALI LETTER GHA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+0999 | ঙ | Bengali | BENGALI LETTER NGA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+099A | চ | Bengali | BENGALI LETTER CA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+099B | ছ | Bengali | BENGALI LETTER CHA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+099C | জ | Bengali | BENGALI LETTER JA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+099D | ঝ | Bengali | BENGALI LETTER JHA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+099E | ঞ | Bengali | BENGALI LETTER NYA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+099F | ট | Bengali | BENGALI LETTER TTA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09A0 | ঠ | Bengali | BENGALI LETTER TTHA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09A1 | ড | Bengali | BENGALI LETTER DDA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09A1 U+09BC | ড় | {Bengali} | BENGALI LETTER DDA + BENGALI SIGN NUKTA | [0], [101], [102], [103] | [Consonant] + U+09BC | ✔ | 09DC is the preferred code point, however it is not available for LGR as per the standards governing this LGR development | ||
U+09A2 | ঢ | Bengali | BENGALI LETTER DDHA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2), | ||
U+09A2 U+09BC | ঢ় | {Bengali} | BENGALI LETTER DDHA + BENGALI SIGN NUKTA | [0], [101], [102], [103] | [Consonant] + U+09BC | ✔ | 09DD is the preferred code point, however it is not available for LGR as per the standards governing this LGR development | ||
U+09A3 | ণ | Bengali | BENGALI LETTER NNA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09A4 | ত | Bengali | BENGALI LETTER TA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09A5 | থ | Bengali | BENGALI LETTER THA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09A6 | দ | Bengali | BENGALI LETTER DA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09A7 | ধ | Bengali | BENGALI LETTER DHA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09A8 | ন | Bengali | BENGALI LETTER NA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09A8 U+09CD U+09A5 | ন্থ | {Bengali} | BENGALI LETTER NA + BENGALI SIGN VIRAMA + BENGALI LETTER THA | [Consonant] + [Halant] + [Consonant] | ✔ | set 3 | Bengali variant | ||
U+09A8 U+09CD U+09B9 | ন্হ | {Bengali} | BENGALI LETTER NA + BENGALI SIGN VIRAMA + BENGALI LETTER HA | [Consonant] + [Halant] + [Consonant] | ✔ | set 3 | Bengali variant | ||
U+09AA | প | Bengali | BENGALI LETTER PA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09AB | ফ | Bengali | BENGALI LETTER PHA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09AC | ব | Bengali | BENGALI LETTER BA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09AD | ভ | Bengali | BENGALI LETTER BHA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09AE | ম | Bengali | BENGALI LETTER MA | [0], [101], [102], [103] | Consonant | ✔ | set 1 | Bangla (1), Manipuri (2), Assamese (2) | |
U+09AF | য | Bengali | BENGALI LETTER YA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09AF U+09BC | য় | {Bengali} | BENGALI LETTER YA + BENGALI SIGN NUKTA | [0], [101], [102], [103] | [Consonant] + U+09BC | ✔ | 09DF is the preferred code point, however it is not available for LGR as per the standards governing this LGR development | ||
U+09B0 | র | Bengali | BENGALI LETTER RA | [0], [101], [102] | C2, Consonant | ✔ | set 4 | Bangla (1), Manipuri (2) | |
U+09B2 | ল | Bengali | BENGALI LETTER LA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09B6 | শ | Bengali | BENGALI LETTER SHA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09B7 | ষ | Bengali | BENGALI LETTER SSA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09B8 | স | Bengali | BENGALI LETTER SA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09B8 U+09CD U+09A5 | স্থ | {Bengali} | BENGALI LETTER SA + BENGALI SIGN VIRAMA + BENGALI LETTER THA | [Consonant] + [Halant] + [Consonant] | ✔ | set 5 | Bengali variant | ||
U+09B8 U+09CD U+09B9 | স্হ | {Bengali} | BENGALI LETTER SA + BENGALI SIGN VIRAMA + BENGALI LETTER HA | [Consonant] + [Halant] + [Consonant] | ✔ | set 5 | Bengali variant | ||
U+09B9 | হ | Bengali | BENGALI LETTER HA | [0], [101], [102], [103] | Consonant | ✔ | Bangla (1), Manipuri (2), Assamese (2) | ||
U+09BE | া | Bengali | BENGALI VOWEL SIGN AA | [0], [101], [102], [103] | Matra | follows-only-C | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+09BF | ি | Bengali | BENGALI VOWEL SIGN I | [0], [101], [102], [103] | Matra | follows-only-C | ✔ | set 2 | Bangla (1), Manipuri (2), Assamese (2) |
U+09C0 | ী | Bengali | BENGALI VOWEL SIGN II | [0], [101], [102], [103] | Matra | follows-only-C | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+09C1 | ু | Bengali | BENGALI VOWEL SIGN U | [0], [101], [102], [103] | Matra | follows-only-C | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+09C2 | ূ | Bengali | BENGALI VOWEL SIGN UU | [0], [101], [102], [103] | Matra | follows-only-C | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+09C3 | ৃ | Bengali | BENGALI VOWEL SIGN VOCALIC R | [0], [101], [102], [103] | Matra | follows-only-C | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+09C4 | ৄ | Bengali | BENGALI VOWEL SIGN VOCALIC RR | [0], [101], [103] | Matra | follows-only-C | ✔ | Bangla (1), Assamese (2) | |
U+09C7 | ে | Bengali | BENGALI VOWEL SIGN E | [0], [101], [102], [103] | Matra | follows-only-C | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+09C8 | ৈ | Bengali | BENGALI VOWEL SIGN AI | [0], [101], [102], [103] | Matra | follows-only-C | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+09CB | ো | Bengali | BENGALI VOWEL SIGN O | [0], [101], [102], [103] | Matra | follows-only-C | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+09CC | ৌ | Bengali | BENGALI VOWEL SIGN AU | [0], [101], [102], [103] | Matra | follows-only-C | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+09CD | ্ | Bengali | BENGALI SIGN VIRAMA | [0], [101], [102], [103] | Halant | follows-only-C | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+09CE | ৎ | Bengali | BENGALI LETTER KHANDA TA | [7], [101], [102], [103] | Consonant, KhandaTa | follows-only-V-C-M-D-B-X-P | ✔ | Bangla (1), Manipuri (2), Assamese (2) | |
U+09F0 | ৰ | Bengali | BENGALI LETTER RA WITH MIDDLE DIAGONAL | [0], [103] | C2, Consonant | ✔ | set 4 | Assamese (2) | |
U+09F1 | ৱ | Bengali | BENGALI LETTER RA WITH LOWER DIAGONAL | [0], [102], [103] | Consonant | ✔ | Manipuri (2), Assamese (2) | ||
U+0A38 | ਸ | Gurmukhi | GURMUKHI LETTER SA | [0] | ✗ | set 1 | Not part of repertoire | ||
U+0A3F | ਿ | Gurmukhi | GURMUKHI VOWEL SIGN I | [0] | ✗ | set 2 | Not part of repertoire |
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.
Number of variant sets | 5 | ||||
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Largest variant set | 3 | ||||
Ordinary Variants by Type |
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Reflexive Variants by Type |
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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.
Source | Glyph | Target | Glyph | Type | Ref | Comment | |
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092E | म | 092E | म | ≡ | out-of-repertoire-var | Out-of-repertoire | |
092E | म | 09AE | ম | ↔ | blocked | Cross-script homoglyph | |
092E | म | 0A38 | ਸ | ↔ | blocked | Cross-script homoglyph | |
09AE | ম | 0A38 | ਸ | ↔ | blocked | Cross-script homoglyph | |
0A38 | ਸ | 0A38 | ਸ | ≡ | out-of-repertoire-var | Out-of-repertoire |
Source | Glyph | Target | Glyph | Type | Ref | Comment | |
---|---|---|---|---|---|---|---|
093F | ि | 093F | ि | ≡ | out-of-repertoire-var | Out-of-repertoire | |
093F | ि | 09BF | ি | ↔ | blocked | Cross-script homoglyph | |
093F | ि | 0A3F | ਿ | ↔ | blocked | Cross-script homoglyph | |
09BF | ি | 0A3F | ਿ | ↔ | blocked | Cross-script homoglyph | |
0A3F | ਿ | 0A3F | ਿ | ≡ | out-of-repertoire-var | Out-of-repertoire |
Source | Glyph | Target | Glyph | Type | Ref | Comment | |
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09A8 09CD 09A5 | ন্থ | 09A8 09CD 09B9 | ন্হ | ↔ | blocked | Bengali variant |
Source | Glyph | Target | Glyph | Type | Ref | Comment | |
---|---|---|---|---|---|---|---|
09B0 | র | 09F0 | ৰ | ↔ | allocatable | Bengali variant |
Source | Glyph | Target | Glyph | Type | Ref | Comment | |
---|---|---|---|---|---|---|---|
09B8 09CD 09A5 | স্থ | 09B8 09CD 09B9 | স্হ | ↔ | blocked | Bengali variant |
Number of named classes | 8 |
---|---|
Implicit (except script) | 1 |
Implict defined by script tag | 3 |
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 |
---|---|---|---|---|---|
C-single | Tag=Consonant | 36 | {0994-09A8 09AA-09B0 09B2 09B6-09B9 09CE 09F0-09F1} | Any Bengali consonant | |
V | Tag=Vowel | 10 | {0985-098B 098F-0990 0993} | Any Bengali vowel letter | |
M | Tag=Matra | 11 | {09BE-09C4 09C7-09C8 09CB-09CC} | Any Bengali vowel sign (matra) | |
H | Tag=Halant | 1 | {09CD} | The Bengali Hasanta (Halant / Virama) | |
B | Tag=Anusvara | 1 | {0982} | The Bengali Onushshar (Anusvara) | |
X | Tag=Visarga | 1 | {0983} | The Bengali Bisarga (Visarga) | |
D | Tag=Candrabindu | 1 | {0981} | The Bengali Candrabindu | |
C2 | Tag=C2 | 2 | {09B0 09F0} | Any Bengali consonant from set C2 | |
implicit | Tag=KhandaTa | 1 | {09CE} | The character tagged as KhandaTa | |
implicit | Tag=sc:Beng | 61 | {0981-0983 0985-098B 098F-0990 0993-09A8 09AA-09B0 09B2 09B6-09B9 09BE-09C4 09C7-09C8 09CB-09CE 09F0-09F1} | Any character tagged as Bengali | |
implicit | Tag=sc:Deva | 2 | {092E 093F} | Any character tagged as Devanagari | |
implicit | Tag=sc:Guru | 2 | {0A38 0A3F} | Any character tagged as Gurmukhi |
Number of rules | 12 |
---|---|
Used to trigger actions | 2 |
Used as context rule (C) | 5 |
Anchored context rules | 5 |
Used only in another rule | 5 |
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 |
---|---|---|---|---|---|---|
C-RRA | \u09A1\u09BC |
NFC form of BENGALI LETTER RRA | ||||
C-RHA | \u09A2\u09BC |
NFC form of BENGALI LETTER RHA | ||||
C-YYA | \u09AF\u09BC |
NFC form of BENGALI LETTER YYA | ||||
C | [:C-single:]|(:C-RRA:)|(:C-RHA:)|(:C-YYA:) |
Section 7, WLE1: All consonants in the LGR repertoire; single code points and sequences | ||||
leading-combining-mark | (start)[[\p{gc=Mn}] ∪ [\p{gc=Mc}]] |
✔ | Default WLE rule matching labels with leading combining marks ⍟ | |||
follows-only-C | ((:C:))← ⚓︎ |
✔ | C | Section 7, WLE 2: H: must be preceded by C ; WLE 3: M: must be preceded by C | ||
follows-only-V-C-M | ([:V:]|(:C:)|[:M:])← ⚓︎ |
✔ | C | Section 7, WLE 4: D: must be preceded by any of V, C, M | ||
follows-only-V-C-M-D | ([:V:]|(:C:)|[:M:]|[:D:])← ⚓︎ |
✔ | C | Section 7, WLE 5: X: must be preceded by any of V, C, M, D; WLE 6: B: must be preceded by any of V, C, M, D | ||
P | [:C2:][:H:] |
Ra-Hasanta, defined for use in WLE-7 | ||||
follows-only-V-C-M-D-B-X-P | ([:V:]|(:C:)|[:M:]|[:D:]|[:B:]|[:X:]|(:P:))← ⚓︎ |
✔ | C | Section 7, WLE 7: Khanda Ta must be preceded by V, C, M, D, B, X, P | ||
follows-H | ([:H:])← ⚓︎ |
✔ | C | Section 7, WLE 8: V cannot be preceded by H, WLE 9: S cannot be preceded by H | ||
no-mix-09B0-09F0 | (\u09B0.*\u09F0)|(\u09F0.*\u09B0) |
✔ | Section 7, WLE 10: U+09B0 (র) and U+09F0 (ৰ) cannot be mixed. |
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 label matches | no-mix-09B0-09F0 | → | invalid | WLE 10: U+09B0 (র) and U+09F0 (ৰ) cannot be mixed. | |
3 | if at least one variant is in | {out-of-repertoire-var} | → | invalid | any variant label with a code point out of repertoire is invalid ⍟ | |
4 | if at least one variant is in | {blocked} | → | blocked | any variant label containing blocked variants is blocked ⍟ | |
5 | if each variant is in | {allocatable} | → | allocatable | variant labels with all variants allocatable are allocatable ⍟ | |
6 | if any label (catch-all) | → | valid | catch all (default action) ⍟ |
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 |
[7] | The Unicode Standard 4.1 Any code point originally encoded in Unicode 4.1 |
[101] | Wikipedia, Bengali alphabet, accessed on 2017-11-25 https://en.wikipedia.org/wiki/Bengali_alphabet |
[102] | Bengali alphabet for Manipuri, found in Omniglot, “Manipuri (Meeteilon/ Meithei)”, accessed on 20.10.2019 https://www.omniglot.com/writing/manipuri.htm |
[103] | Omniglot, “Assamese (অসমীয়া)”, accessed on 2020-04-28 https://www.omniglot.com/writing/assamese.htm |