This file contains a set of Label Generation Rules (LGR) for the Korean script for the Root Zone. For more details on this LGR and additional background on the script, see “Proposal for a Korean Script Root Zone Label Generation Ruleset (LGR)” [Proposal-Korean], including the appendices [Proposal-Korean-Appendices]. The term “Korean script” is usually synonymous with “Hangul”. However, in the context of the Korean LGR, “Korean script” refers to the union of Hangul Syllables and Han characters used in writing Korean (Hanja). 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].
The repertoire includes 11,172 Hangul syllables and 4,758 Hanja characters for a total of 15,930 code points (11,172 + 4,758). For more details, see Section 5, “Repertoire” in [Proposal-Korean].
The repertoire is contained in [MSR-6], which is a subset of [Unicode 16.0.0].
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 Korean 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.
There are no variants defined between Hangul syllables. However, the LGR defines 37 variant sets among Hanja, and 7 variant sets containing at least one Hangul syllable. For more details, see Section 6 “Variants” in [Proposal-Korean].
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. 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 example, this LGR includes all in-script Hanja variants acquired through integration with the Chinese RZ-LGR [CLGR]. In addition to the variants listed in this LGR, integration into the Root Zone LGR will result in many additional variants to out-of-repertoire code points as result of variants defined in other LGRs, including the effects of transitivity.
Altogether, this LGR lists 289 variant sets, which can be classified as follows:
Because one variant set is classified in both group 1 and 2, the total of variant sets is 283+4+3-1 = 289.
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 labels should be blocked. There is no preference among these labels.
This LGR does not define allocatable variants.
The specification of variants in the Root Zone LGR follows the guidelines in [RFC 8228].
The following source references are used for variant entries in this LGR:
This LGR defines the following named character classes:
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.
A label may consist of Hangul syllables or Hanja characters only; no mixes are allowed. See also Section 7, “Whole Label Evaluation Rules (WLE)” in [Proposal-Korean].
The Root Zone LGR for the Korean Script was developed by the Korean Generation Panel. For details on methodology and contributors, see Sections 4 and 8 in [Proposal-Korean], as well as [RZ-LGR-6-Overview].
References [0] to [3] refer to the Unicode Standard versions in which corresponding code points were initially encoded. For example, a reference value of [3] means a character was first encoded in Unicode Version 3.0.
References [101] and up indicate that the code point is included in one of the following source references:
Entries in the table may have multiple source reference values.
In addition, the following general references are cited in this document:
For references consulted, particularly in designing the repertoire for the Korean script for the Root Zone, please see details in the Table of References below. References [0] and above refer to the Unicode Standard version in which corresponding code points were initially encoded. References [101] and above correspond to a source given in [Proposal-Korean] for justifying the inclusion of the corresponding code points and variants. Entries in the table may have multiple source reference values. If links to certain references are not available, the data may be archived as part of [Proposal-Korean].
]]>