সাঁচ:ISO 15924 direction

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Usage[সম্পাদনা কৰক]

The template returns, for an ISO script code, the direction rtl, ltr, mixed, <blank>.

Options[সম্পাদনা কৰক]

The output texts rtl, ltr, mixed, <blank> can be altered:

  • {{ISO 15924 direction|Mang|ltr=left-to-right|rtl=right-to-left|mixed=both directions|default=unknown}} → unknown
  • {{ISO 15924 direction|Zyyy|ltr=left-to-right|rtl=right-to-left|mixed=both directions|default=unknown}} → both directions

How is it determined[সম্পাদনা কৰক]

The direction is determined as follows.

  • First, if a script is present in Unicode, Unicode Bidi-direction is derived for that Unicode script.

There are 94 scripts in Unicode (those ISO codes that have an alias). All regular scripts have a single "Strong" in Unicode direction. That is, all characters in a Unicode script that are "Strong", have the same directionality: either right-to-left (rtl) or left-to-right (ltr). Within a script there are no opposing directions present. There can be characters with "Weak" or "Neutral" direction (i.e., direction through context), but these do not alter other characters diretionality. One exception: script "Zyyy" conatains characters with either direction. Therefor, Zyyy has direction "mixed".

  • Second, all other scripts, that are not defined in Unicode, can have their direction set manually in this template.

How to add a script direction[সম্পাদনা কৰক]

The Unicode scripts are determined as of version 6.0, and should be complete & correct. That (upper) part of the list should not be changed unless for errors. An script directionality can be added:

 | <!--
end of Unicode-determined -->
 | Abcd
 | Defg = {{{ltr|ltr}}
 | Pqrs
 | Tuvw = {{{rtl|rtl}}
 | #default={{{default|}}}

The parameters as shown keep the output text option available.

Background[সম্পাদনা কৰক]

For scripts in Unicode, the direction is determined as follows. Each character in a script (say Hebr) has a single property bidi-type. The value of that bidi-type is from a list, and its usage is described in the Unicode Bidi Algorithm (UAX#9).

The bidi-type can determine the direction, which can be a Strong, Neutral or Weak one. Strong directions are independent, like for the Latin alphabet A-Z. Neutral and Weak directions are dependent on context (think nearby other characters), and are used e.g. with decimals, diacritics and punctuation marks.

Within the character set of a script (e.g. Hebr=Hebrew script has 133 characters in Unicode), there are Strong characters, all are right-to-left. Other characters are Neutral, and so have not direction by their own. This is true for all (but one) scripts in Unicode: withingn a script, all Strong directions are the same.

From there this templates is build: All scripts in Unicode (but one exception, see below) have a single Strong direction. That direction is used here in this template. The exception is: Zyyy, Common, which is a collection of various characters that can be of either direction.

See also[সম্পাদনা কৰক]

General information on ISO 15924 templates[সম্পাদনা কৰক]

Subtemplates[সম্পাদনা কৰক]

ISO updates[সম্পাদনা কৰক]

The ISO list is changed regularly, last years in June and December. Current list is completed ৯ আগষ্ট  ২০১১ (2011 -08-09) অনুসৰি. This list has 160 defined codes (code, number, script name).

Note: when resolving red links or wrong links, edit {{ISO 15924/wp-name}} or {{ISO 15924/wp-category}}. That is where the connection between ISO code and Wikipedia names is made.

Wikipedia updates[সম্পাদনা কৰক]

We here at Wikipedia do not and can not decide over ISO 15924. End of story. What we can do is: provide good connections froman ISO code to a Wikipedia page, for example. Is what we do here:

Sources[সম্পাদনা কৰক]

See also[সম্পাদনা কৰক]

References[সম্পাদনা কৰক]

<references>

  1. http://www.unicode.org/iso15924/iso15924-codes.html
  2. http://www.unicode.org/iso15924/iso15924-text.html(downloadable flat textfile)