Label Generation Rules for the Bosnian language using the Latin script

Overview

This document specifies a reference set of Label Generation Rules for Bosnian-Latin using a limited repertoire as appropriate for a second level domain.

Repertoire

All references converge on 31 (27+4) Latin code points.

There is no IDN table published in the IANA Repository of IDN Practices by .ba ccTLD

Because the formal differentiation of Bosnian from the other languages of former Yugoslavia is so recent, and its Latin writing system has not added any letters, older refrences for Latin character use are still applicable.

Excluded code points

None.

Extended code points

None.

The four letters 'q', 'w', 'x' and 'y' are not part of the core alphabet for Bosnian. However, they are included here as part of the core repertoire because of their use in representing foreign words, brand names and other common uses such as "www" in domain names.

Variants

None.

Character Classes

This LGR defines no named character classes.

Rules

Common rules only:

• Hyphen Restrictions — restrictions on the allowable placement of hyphens (no leading/ending hyphen and no hyphen in positions 3 and 4). These restrictions are described in section 4.2.3.1 of RFC5891 [120]. They are implemented here as context rule on U+002D (-) (-) HYPHEN-MINUS.

• Leading Combining Marks — restrictions on the allowable placement of combining marks (no leading combining mark). This rule is described in section 4.2.3.2 of RFC5891 [120].

Actions

Actions included are the default actions for LGRs as well as those needed to invalidate labels with misplaced combining marks.

Methodology and Contributors

This reference LGR for Bosnian-Latin for the 2nd Level has been developed by Michel Suignard and Asmus Freytag, verified in expert reviews by Michael Everson, Nicholas Ostler, and Wil Tan, and based on multiple open public consultations.

References

General references for the language:

• Uzicanin, Nikolina. 1996. Hippocrene compact dictionary: Bosnian-English English-Bosnian. New York: Hippocrene Books. ISBN 0-7818-0499-X
• Wikipedia: "Gaj's Latin alphabet",
  http://en.wikipedia.org/wiki/Gaj%27s_Latin_alphabet
• Omniglot: "Bosnian (bosanski)"
  http://www.omniglot.com/writing/bosnian.htm

In the listing of the repertoire by code point, references starting from [0] refer to the version of the Unicode Standard in which the corresponding code point was initially encoded. Other references (starting from [100]) document usage of code points. For more details, see the Table of References below.

Character Classes

The following table lists all named 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
implicit	Tag=sc:Latn	31 Elements:	{0061-007A 0107 010D 0111 0161 017E}
implicit	Tag=sc:Zyyy	11 Elements:	{002D 0030-0039}

Whole label evaluation and context rules

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. (Any use of context rules for variants is not indicated).

Name	Used as Trigger	Used as Context	Anchor	Regular Expression	Ref	Comment
leading-combining-mark	✔			(^[∅=[[∅=\p{gc=Mn}][∅=\p{gc=Mc}]]])	[120]	RFC5891 restrictions on placement of combining marks
hyphen-minus-disallowed		✔	✔	((((?<=^)⚓)|(⚓(?=$))|((?<=^..\u002D)⚓)))	[120]	RFC5891 restrictions on placement of U+002D
extended-cp				(^$)		code points from the extended range

Note: The following rules are defined but not used in this LGR: extended-cp.

Actions

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		by default, labels with leading combining marks are invalid
2	if any label (catch-all)		→	valid		catch all