This file contains a set of Label Generation Rules for the Chinese script (CLGR) using a limited repertoire as would be appropriate for the Root Zone.
For more details, see "Proposal for the Generation Panel for the Chinese Script Label Generation Ruleset for the Root Zone" [Proposal]. The format of this file follows [RFC 7940].
According to Section 5 in [Proposal], this repertoire is the union of CDNC IDN Table and dotAsia IDN Table. It is a part of [MSR-4], which is a subset of [Unicode 6.3].
The "tag" attribute for each code point or range indicates the script or scripts that the code point is used with, using Unicode script identifiers, preceded by "sc:".
The "ref" attribute for each code point or range contains the Unicode version for which the corresponding code points were first encoded.
For example, ref="4" means a character was first encoded in Unicode Version 3.1.
A ref value from 100 to 600 indicates that the code point is included in CDNC IDN Table, dotAsia IDN Table, JGP repertoire, KGP repertoire, and IICORE.
For example, ref="200" means a character is also used in dotAsia IDN Table.
According to Sections 6 and 7 of the [Proposal] the LGR contains semantic exchangeable variants (same pronunciations as well as the same meanings) and visual identical variants.
The "ref" attribute for each variant mapping entry indicates if the variant mapping is same or different with the rules of CDNC, dotAsia, JGP and KGP, OR complies with the IP��s suggestions
For example, ref="201"means the variant mapping matches in both dotAsia code point and variant type", ref="202" means the variant mapping matches only in dotAsia code point but not variant type, while ref="203" means the variant mapping matches no dotAsia code point"
The ref="701"means the variant mapping complies with the IP suggestions in both code point and variant type"
The ��comment�� attribute for each variant mapping entry indicates if it is the reflexive identity or is replaced by some other type to reduce the number of multiple allocatable labels in Section 6.3 of [Proposal]
For example, a variant comment of "r-both-ms" indicates that for a given code point, the variant type is inherently "r-both", but because there is at least another variant of type "simp" (or of one of the other simplified types), the variant is preferred in a traditional context. In other words, it is to be treated as a "r-trad", with the result that: A simp label containing this variant should be BLOCKED; A trad label containing this variant should be ALLOCATABLE.
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].
The LGR contains additional Chinese-specific actions as described in Section 6 and 7of [Proposal]. These resolve an extended set of variant types into the disposition for variant labels of either "allocatable" or "blocked".
The LGR has 7 basic variant types: "simp", "r-simp", "trad", "r-trad", "both", "r-both", and "r-neither".
The actions defined of these types in the LGR allow the original label, all simplified labels and all traditional labels by blocking the mixture of simplified and traditional chars .
The LGR defines 4 new types ("simp-1", "simp-2", "trad-1", "trad-2") and the corresponding actions to reduce the number of multiple allocatable labels, limiting the number no more than 5.
The LGR does no define extra new types to handle visual similar variants, but alternatively adopts ��both�� and ��blocked�� in Section 7 of [Proposal]
The LGR for the Chinese script was developed by the Chinese Script Generation Panel (CGP). For further details on methodology and contributors, see Sections 4 and 9 in [Proposal].
The following general references are cited in this document:
[Proposal]
Chines Script Generation Panel (CGP), "Proposal for the Generation Panel for the Chinese Script Label Generation Ruleset for the Root Zone", DATE-TBD, https://www.icann.org/en/system/files/files/chinese-script-lgr-proposal-DATE-TBD-en.pdf
[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
[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
[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/
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