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This document specifies a set of Label Generation Rules (LGR) for the Javanese Script. The format of this file follows [RFC 7940].
For details and additional background on the Javanese script, see "Javanese Script Reference Label Generation Rules for Second-Level Domain Names" [Proposal-Javanese].
The repertoire for the Javanese Script contains 76 characters as defined in Section 5.1 “Included Code Points” in [Proposal-Javanese].
For the second level, the repertoire has been augmented with the ASCII digits, U+0030 to U+0039, plus U+002D HYPHEN-MINUS, for a total of 76 repertoire elements.
Any code points outside the Javanese Script repertoire that are targets for out-of-repertoire variants would be included here only if the variant is listed in this file. In this case they are identified as a reflexive (identity) variant of type “out-of-repertoire-var”. Whether or not they are listed, they do not form part of the repertoire.
Repertoire Listing: Each code point or range is tagged with the script or scripts with which the code point is used and one or more other character categories. For each repertoire element, one or more references document sufficient justification for inclusion in the repertoire; see the “References” below. For code points that are part of the repertoire, comments identify the languages using the code point along with their [EGIDS] level.
The following 23 code points from the Javanese block in [Unicode 15.1.0] have been excluded in the Reference LGR repertoire due to a variety of reasons; some are used only in Sanskrit or ancient manuscripts. The digits are excluded because many of them are homographs of letters.
See Section 5.2 “Excluded Code Point” in [Proposal-Javanese].
The LGR defines a number of in-script variants. The variants are based on linguistic and orthographic analysis of the Javanese script, as well as contemporary and historical usage patterns. There are two sets of consonants in the Javanese script, Aksara Murda and Aksara Wyanjana, which are used to represent the same set of sounds, but differ in whether they are used in a formal or informal context. They are otherwise interchangeable; if any label containing one of these variants is selected first, other equivalent variant labels must be blocked.
Digit Variants: The Javanese reference LGR does not include native digits, so there are no semantic variants defined.
Should an extension be contemplated that adds native digits, these might require variant relations. At the same time, however, any native digits would normally be semantic variants of the ASCII digits. In any zone containing multiple scripts, these two types of variant relation for digits may lead to complication once transitivity is applied.
This LGR does not define allocatable variants.
The specification of variants in this LGR follows the guidelines in [RFC 8228].
The LGR defines the following character classes:
The LGR provides script specific restrictions on the allowable placement of initial code point of a label, as well as restrictions on composition. These are implemented with the following rules:
By default, the LGR includes the rules and actions to implement the following restrictions mandated by the IDNA protocol. They are marked with ⍟.
Script-specific rules in this LGR already prevent combining marks in leading position making the "leading-combining-mark" rule technically redundant. It is retained here for consistency.
This LGR includes the complete set default actions for LGRs as well as the action needed to invalidate labels with misplaced combining marks. They are marked with ⍟. For a description see [RFC 7940] and [5891]. An additional action is triggered by mixed digit labels.
The LGR defines the following script-specific context rules concerning the of various classes of characters.
The LGR defines the following script-specific whole label rules:
This rule is implemented as a whole-label rule which triggers a corresponding action, invalidating any label containing the full pattern. As this pattern also occurs within any triple-stack pattern, triple stacking is invalidated at the same time. For a WLE rule, it is immaterial whether the code points are part of a sequence or not, therefore, the special handling of sequences in 7.2 is implicit.
This LGR includes the default actions for LGRs as well as the action needed to invalidate labels with misplaced combining marks. They are marked with ⍟. For a description see [RFC 7940].
The pangkon restriction rule triggers a Javanese-specific action that invalidates any original and variant labels not satisfying the constraints. See Section 7, “Whole Label Evaluation (WLE) Rules” in [Proposal-Javanese].
This Second Level Reference LGR for the Javanese Script was developed based on the proposal from the Javanese Script Reference LGR Generation Panel and edited by Asmus Freytag based on community feedback and public review. See [Proposal-Javanese] for methodology and contributors.
This is a placeholder to document any changes applied by the registry operator when adopting the reference LGR. If no change has been noted, the LGR is the same as the Second Level Reference LGR for the Javanese Script [Ref-LGR-und-Java] without normative changes.
This document cites the following general references.
References [0] to [10] refer to the Unicode Standard versions in which the corresponding code points were initially encoded. References [110] and above correspond to sources given in [Proposal-Javanese] justifying the inclusion of the corresponding code points. Entries in the table may have multiple source reference values. In the listing of whole label evaluation and context rules, reference [5891] indicates the source for common rules.