扩展:WikibaseMediaInfo
WikibaseMediaInfo 发行状态: 稳定版 |
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描述 | Wikibase extension to manage structured metadata of media files |
作者 | Structured Data team |
最新版本 | 持续更新 |
MediaWiki | master |
数据库更改 | 是 |
许可协议 | GNU通用公眾授權條款2.0或更新版本 |
下載 | readme |
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季度下載量 | 10 (Ranked 127th) |
翻译WikibaseMediaInfo扩展 | |
問題 | 开启的任务 · 报告错误 |
WikibaseMediaInfo is an extension to Wikibase adding a MediaInfo entity for handling structured data about multimedia files.
The extension hooks into the File Page. It stores supplemental metadata (captions and depicts statements) about the file in a MediaInfo Entity. The user can view, create, edit, and delete this data.
条件
安裝
- Ensure these extensions are installed and set up properly: CirrusSearch, Wikibase (Client and Repository), and WikibaseCirrusSearch.
- 下载文件,并将解压后的
WikibaseMediaInfo
文件夹移动到extensions/
目录中。
开发者和代码贡献人员应从Git安装扩展,输入:cd extensions/
git clone https://gerrit.wikimedia.org/r/mediawiki/extensions/WikibaseMediaInfo - 只有從git安裝才运行Composer来安装PHP依赖,通过发行
composer install --no-dev
至扩展目录。 (参见工單T173141了解潜在问题。) - 将下列代码放置在您的LocalSettings.php 的底部:
wfLoadExtension( 'WikibaseMediaInfo' );
- 运行更新脚本,它将自动创建此扩展必须依赖的数据库表。
- Configure as reqiured.
- 完成 – 在您的wiki上导航至Special:Version,以验证已成功安装扩展。
媒体信息界面
MediaInfo entities are shown on, and can be edited from, their associated File page and while uploading a file via UploadWizard.
There are separate sections in the UI for editing captions and statements.
An editing interface is always shown for default properties (defaults are defined in config). On live Commons, depicts is the only default property — users are encouraged to describe what an image depicts. Statements with other properties can be added by the user at will.
詞彙
媒体信息实体
A Wikibase entity that contains structured data about media files. It is stored in a slot on a File page and consists of
- an ID in the form Mxxx, where xxx is the id of the associated wiki page
- 任意数量的标题(每种语言一个)
- 任意数量的声明
标题
描述媒体文件的短语及其语言。 Used to provide a short description of the file (the same as 'labels' in Wikibase).
Statement
A single fact about a media file consisting of a key-value pair such as Licence=CC-BY-SA
or Depicts=Dog
.
Keys are always a property. Values can be any wikibase datatype.
Strictly, a wikibase 'statement' means a key-value pair (a 'claim') plus a rank (preferred
, normal
, or deprecated
) and zero or more documentary references.
We don't typically have documentary references for descriptions of files, and all statements have a normal
rank by default, so in MediaInfo, we prefer to use the term 'statement' instead of 'claim'.
Property
A property is a file's property that can have a value - for example, 'depicts' (what an image is a picture of), 'resolution', 'created by', 'license'.
Each property has a unique id in wikibase in the form Pxxx
such as P123
.
Item
An item is a concept, topic, or object with an ID - for example, on Wikidata, the CC0 license is Q6938433, physics is Q413 and the planet Earth is Q2.
Each item has a unique id in wikibase in the form Qxxx
such as Q123
.
限定符
A qualifier is a secondary statement that modifies the primary statement. For example, an image might have a tree in the foreground and the sea in the background, in which case it could have 2 'depicts' claims associated with it - 'depicts=tree(applies to part=foreground)' and 'depicts=sea(applies to part=background)'.
搜索
以标题搜索
Users can search for files by their MediaInfo captions just as they would search for anything else. For example, if a user uploads a picture of the Eiffel Tower and enters 'Tour Eiffel' (French) and 'Eiffel Tower' (English) as multilingual file captions, the picture is findable by another user searching for either 'Eiffel Tower' or 'Tour Eiffel'.
Searching for claims/statements
Searching for claims/statements happens via WikibaseCirrusSearch keywords; for details, see:
搜索实现方法
When the File page is saved, the following MediaInfo data is written to the Elasticsearch index (all examples use Wikidata Property and Item IDs):
- Captions data in every language is stored in the
opening_text
field
- Claims are stored in the format
propertyID=value
as array elements in thestatement_keywords
field using the Wikibase property ID (and item ID, if the value is an item)
- , e.g., 'depicts house cat' is stored as P180=Q146
- Claims with qualifiers are stored in the
statement_keywords
field along with their qualifiers in the formatpropertyID=value[qualifierPropertyID=qualifierValue]
. For example, the Mona Lisa painting (Wikidata item Q12418) depicts a sky (Q13217555) in the background (Wikidata property P518). If we arrange this data in a Wikibase claim, it would be: 'depicts sky, applies to part background', which would be stored asP180=Q12418[P518=Q13217555]
- Note that claims with qualifiers are also stored without the qualifier to increase their findability. So, for example, if someone entered the above claim-plus-qualifier, the claim
P180=Q12418
is also stored, so that someone can find the file by searching for 'depicts sky' alone, as well as by searching for 'depicts sky, applies to part background'.
- Claims data with qualifiers where the qualifier value is a quantity is stored in the
statement_quantity
field in the formatpropertyID=value|quantity
, e.g., 'depicts human, quantity 1' is stored asP180=Q5|1
.
Note that not all claims are stored. A claim will be indexed in ElasticSearch only if ALL of the following conditions are true:
- The claim has a real value (i.e., its value is not 'no value' or 'unknown value') AND
- We know how to process its value for indexing. More value processors may be added in the future, but currently, we require the claim's value to be either a Q item ID, a string (alphanumeric), or a quantity (numeric) AND
- the claims's Wikidata property ID is NOT in a configurable list of excluded IDs (
$wgWBRepoSettings[ 'searchIndexPropertiesExclude' ]
) AND either its property ID is in a configurable list of property IDs that should be indexed ($wgWBRepoSettings[ 'searchIndexProperties' ]
) OR its property type is in a configurable list of property types that should be indexed ($wgWBRepoSettings[ 'searchIndexTypes' ]
)
Note that for a claim's quantities to be stored, the claim must meet all the criteria above AND the property ID for the quantity qualifier must be present in a configurable list of property IDs ($wgWBRepoSettings[ 'searchIndexQualifierPropertiesForQuantity' ]
).
MediaSearch search profile
Structured data (captions and statements) are now also included in the default search profile when searching (only) in the NS_FILE
namespace.
Search terms like "dog" will also include files where the caption (in the user's language) contains "dog", or contains a statement P180=Q144
(depicts=dog).
The Extension: WikibaseMediaInfo/MediaSearch subpage provides a more elaborate (technical) writeup of the MediaSearch search profile.
配置
Extension configuration variables are sets of key-value pairs.
They are documented in more detail in WikibaseMediaInfo/extension.json
.
All config variables are added toLocalSettings.php
.
The following config options are available for this extension:
Config (in LocalSettings.php)
$wgMediaInfoProperties
Default wikibase properties that will always be shown, allowing users to add/edit/delete values for them, on the File page/UploadWizard, regardless or not they already have a value. This is the depicts (P180) property on live Commons, as we want to encourage users to fill in values for this in particular. Value is an array of key-value pairs connecting a label name to an existing wikibase database ID.
['depicts' => 'P180']
$wgMediaInfoHelpUrls
URLs for pages where a user can learn more about particular wikibase properties - if there is a help URL for a particular property, then there will be a "learn more" link for that property that leads to the URL from the config.
['P180' => 'https://www.wikidata.org/wiki/Property:P180']
Other Config
$wgUploadWizardConfig['wikibase']['enabled']
Enables MediaInfo data on UploadWizard when set totrue
.
开发
测试
PHPUnit tests are in tests/phpunit
. You can run tests not requiring the MediaWiki framework (located in tests/phpunit/composer
) by running composer test
.
This command also runs code style checks using PHPCS.
Tests relying on the MediaWiki framework (located in tests/phpunit/mediawiki
) must be run using MediaWiki core’s composer phpunit:entrypoint
endpoint.
JavaScript 测试位于 tests/node-qunit
。
You can run tests from a terminal with npm run test:unit
.
Node version 6.x should be used.
參見
此扩展用于一个或多个维基媒体项目。 这可能意味着扩展足够稳定、运作足够良好,可以用在这样的高流量的网站上。 请在维基媒体的CommonSettings.php和InitialiseSettings.php配置文件中查找此扩展的名称以查看哪些网站安装了该扩展。 特定wiki上的已安装的扩展的完整列表位于Special:Version页面。 |
此扩展在以下wiki农场/托管网站和/或软件包中提供: 這不是一份權威名單。 即使某些wiki农场/托管网站和/或软件包未在这里列出,它们也可能提供此扩展。 请检查你的wiki农场/托管网站或软件包以确认提供情况。 |