Phabricator のプロジェクト名 #cognate

Extension:Cognate

From MediaWiki.org
Jump to navigation Jump to search
This page is a translated version of the page Extension:Cognate and the translation is 9% complete.

Other languages:
Deutsch • ‎English • ‎Esperanto • ‎Nederlands • ‎español • ‎euskara • ‎français • ‎magyar • ‎português do Brasil • ‎中文 • ‎日本語
MediaWiki 拡張機能マニュアル
OOjs UI icon advanced.svg
Extension:Cognate
リリースの状態: 安定
実装 Database
説明 Link different language versions of a page by using the page title.
作者 Gabriel Birke, Addshore
最新バージョン Continuous updates
互換性ポリシー リリースブランチ
MediaWiki 1.29+
データベースの変更 はい
テーブル cognate_sites
cognate_pages
cognate_titles
ライセンス GNU General Public License 2.0 or later
ダウンロード
使用するフック
PageContentSaveComplete
LanguageLinks
ArticleDeleteComplete
translatewiki.net で翻訳を利用できる場合は、Cognate 拡張機能の翻訳にご協力ください
使用状況とバージョン マトリクスを確認してください。
問題点 未解決のタスク · バグを報告

The Cognate extension creates a central store where the page titles for a group of sites are stored. It can then generate interwiki links across wiki projects in cases where the titles are the same. It was developed to solve the "Centralize interwiki language links for Wiktionary" task.

"Cognate" is a linguistic concept, referring to words in different languages developed from the same origin. This means that this extension is misnamed—since this extension links pages with the same title across wikis, a proper name would be “Homograph”.

Assumptions and restrictions

  • Pages must be in one of the standard MediaWiki namespaces.
  • Page titles are the same across languages (with some simple normalization applied).
  • Sites should have the same interwiki structure for language links.
  • Pages should not contain inter language links in wikitext as these will override the link provided by Cognate.
  • Unexpected hash conflicts are unlikely but could occur, and would result in unexpected language links.

How it works

Title Normalization

Very simple title normalization (reduction to ASCII) occurs within the extension. This can be seen in the StringNormalizer class.

Initially the amount of normalization is very small. Requests can be made to expand this and will be added on a case by case basis.

String Normalized Notes
Hello… Hello... The raw string contains an ellipsis character. This is normalized to three . characters
lepelle’ lepelle' The normalized string has a normalized apostrophe.

Title Hashing

Titles are hashed using sha256. This can be seen in the StringHasher class.

Part of the hash is then stored in the database in a BIG_INT field for efficient lookups.

There are roughly 18,446,744,073,709,551,615 possible values.

String Hash Int
A 559AEAD08264D5795D3909718CDD05ABD49572E84FE55590EEF31A88A08FDFFD 6168500820899059065
Foo 1CBEC737F863E4922CEE63CC2EBBFAAFCD1CFF8B790D8CFD2E6A5D550B648AFA 2071311921841431698
1234567890 C775E7B757EDE630CD0AA1113BD102661AB38829CA52A6422AB782862F268646 -4074095513246505424

Matching Hashes

As titles that require links are assumed to be the same post normalization, they will result in the same hash and thus the same Int stored in the database.

Some sample data might look as follows when loading the "Foo..." page on enwiktionary.

ウィキ Title Hash Int Normalized Hash Int Notes
enwiktionary Foo... 395730596998145766 395730596998145766 Matched row
frwiktionary Foo… -7435652355441782233 395730596998145766 Matched row, even though the pre normalized title includes the ellipsis character.
dewiktionary Foo... 395730596998145766 395730596998145766 Matched row
arwiktionary Foo 2071311921841431698 2071311921841431698

Overwriting

It is possible to overwrite the automatic links provided by Cognate, simply by adding one or more interwiki links in the page.

That also means that to make Cognate work when the extension is deployed, the pages should not contain inter language links in their wikitext.

Testing

Wikimedia Cloud Services logo notext.svg

The extension can be tested on beta wiktionary sites:

These sites are linked together using the Cognate extension with added interwiki sorting provided by the InterwikiSorting extension.

インストール

  • ダウンロードして、ファイルを extensions/ フォルダー内の Cognate という名前のディレクトリ内に配置します。
  • 以下のコードを LocalSettings.php の末尾に追加します:
    wfLoadExtension( 'Cognate' );
    # Settings used in WMF production
    # Use the external cluster 'extension1' and dbname 'cognate_wiktionary'
    $wgCognateDb = 'cognate_wiktionary';
    $wgCognateCluster = 'extension1';
    # Only work on the main namespace
    $wgCognateNamespaces = [ 0 ];
    
  • 更新スクリプトを実行します。このスクリプトは、この拡張機能が必要とするデータベース テーブルを自動的に作成します。
  • Yes 完了 – ウィキの「Special:Version」に移動して、拡張機能が正しくインストールされたことを確認します。
  • Populate the sites table by running the populateCognateSites.php maintenance script. Sites must already exist in the MediaWiki sites table with the correct groupings.
php ./maintenance/populateCognateSites.php --site-group=wiktionary
  • Populate the page and title tables by running the populateCognatePages.php maintenance script.
php ./maintenance/populateCognatePages.php