Help:CirrusSearch/fr

CirrusSearch is a new search engine for MediaWiki. The Wikimedia Foundation migrated to CirrusSearch since it features key improvements over the previously used search engine, LuceneSearch. Cette page décrit les changements liés à cette transition.

Questions fréquentes
Si votre question ne trouve pas de réponse ici, n’hésitez pas à demander sur la page de discussion et quelqu’un vous y répondra.

Quelles sont les améliorations ?
Le nouveau moteur de recherche apporte trois améliorations principales par rapport à l'ancien, à savoir :


 * Meilleur support pour la recherche dans différentes langues.
 * Des mises à jour plus rapides pour l'indexation, ce qui veut dire que les changements seront visibles dans les résultats de recherche plus vite.
 * Expanding templates, meaning that all content from a template is now reflected in search results.

Mises à jour
Updates to the search index are done in near real time. You should be able to search for your changes as soon as you make them. Changes to templates should take effect in articles that include the template in a few minutes. The templates changes use the job queue, so performance may vary. A null edit to the article will force the change through, but that shouldn't be required if everything is going well.

Suggestions de recherche
The search suggestions you get when you type into the search box that drops down candidate pages is substantively the same with articles sorted by the number of incoming links. Worth noting is that if you start your search with ~ we won't find any articles as you type and you can safely hit enter at any time to jump to the search results page.

ASCII/accents/diacritics folding is turned on for English text, but there are some formatting problems with the result. See 52656.

Recherche de texte brut
La recherche de texte brut (qui vous amène sur la page de recherche) s'effectue dans les titres, les redirections, les titres de paragraphe ou le texte des pages donc ne devrait présenter aucune surprise. Le changement le plus important ici est que c'est le contenu des modèles dans les pages en question qui est pris en compte, plutôt que le wikicode du modèle lui-même.

Stemming
There is support for dozens of languages, but all languages are wanted. There is a list of currently supported languages at elasticsearch.org; see their documentation on contributing to submit requests or patches.

Filtres (intitle:, et incategory:)


We've tightened up the syntax around these quite a bit.


 * intitle:foo
 * Find articles whose title contains foo. Stemming is enabled for foo.
 * intitle:"fine line"
 * Find articles whose title contains fine then line. Stemming is enabled. Matches The finest (lines) but not The finest ever lines.
 * intitle:foo bar
 * Find articles whose title contains foo and whose title or text contains bar.
 * -intitle:foo bar
 * Trouve les articles dont le titre ne contient pas « foo » ou dont le texte contient « bar »
 * intitle: foo bar
 * Erreur de syntaxe, revient à chercher les articles dont le titre ou le texte contient « intitle: », « foo » et « bar ».
 * incategory:Musique
 * Trouve les articles de la Catégorie:Musique
 * incategory:"histoire musicale"
 * Trouve les articles qui sont dans la Catégorie:Histoire_musicale
 * incategory:"musicals" incategory:"1920"
 * Find articles that are in both Category:Musicals and Category:1920
 * -incategory:"musicals" incategory:"1920"
 * Find articles that are not in Category:Musicals but are in Category:1920
 * cow*
 * Find articles whose title or text contains words that start with cow
 * linksto:Help:CirrusSearch
 * find articles that link to a page
 * -linksto:Help:CirrusSearch CirrusSearch
 * find articles that mention CirrusSearch but do not link to the page Help:CirrusSearch

prefix:
La syntaxe prefix: dans sa forme passée est utilisée pour un tas de fonctionnalités et a donc été conservée aussi fidèlement que possible.


 * prefix:cheval
 * Trouve les pages de l'espace de noms principal (les articles) dont le titre commence par « cheval ».
 * domestique prefix:cheval
 * Trouve les pages de l'espace de noms principal dont le titre commence par « cheval » et qui contiennent le mot « domestique ».
 * domestic prefix:Cow/
 * Trouve toutes les sous-pages de l'article « Cheval » dans l'espace de noms principal et qui contiennent le mot « domestique ». C'est une recherche très courante et fréquemment faite avec le paramètre spécial de l'URL « prefix= ».
 * domestique prefix:Discussion:Cheval/
 * Trouve toutes les sous-pages de la page de discussion « Discussion:Cheval » qui contiennent le mot « domestique ».
 * cheval prefix:Pink Floyd/
 * Trouve toutes les sous-pages de l'article « Pink Floyd » dans l'espace de noms principal qui contiennent le mot « cheval ». L'espace n'a ici pas de signification.

Notez que les anciennes règles consistant à mettre prefix: à la fin de la requête s'appliquent encore.

Préfixes spéciaux

 * Find articles whose text is most similar to the text of the given articles.
 * The  query works by choosing a set of words in the input articles and run a query with the chosen words. You can tune the way it works by adding the following parameters to the search results URL:
 * : Minimum number of documents (per shard) that need a term for it to be considered.
 * : Maximum number of documents (per shard) that have a term for it to be considered.
 * : Maximum number of terms to be considered.
 * : Minimum number of times the term appears in the input to doc to be considered. For small fields this value should be 1.
 * : Minimal length of a term to be considered. Defaults to 0.
 * : The maximum word length above which words will be ignored. Defaults to unbounded (0).
 * (comma separated list of values): These are the fields to use. Allowed fields are,  ,  ,  ,   and.
 * ( | ): use only the field data. Defaults to : the system will extract the content of the   field to build the query.
 * : The percentage of terms to match on. Defaults to 0.3 (30 percent).
 * Example:
 * These settings can be made persistent by overriding  in Help:System message.
 * Find articles in the talk namespace whose title or text contains the word foo
 * Find articles in the file namespace on this wiki and commons whose title or text contains the word
 * You can add  to the query (like  ) to remove the results from commons
 * Find articles in the file namespace on this wiki and commons whose title or text contains the word
 * You can add  to the query (like  ) to remove the results from commons
 * You can add  to the query (like  ) to remove the results from commons
 * You can add  to the query (like  ) to remove the results from commons

Did you mean
"Did you mean" suggestions are designed to notice if you misspell an uncommon phrase that happens to be an article title. If so, they'll let you know. They also seem to suggest more things than they ought to sometimes.

Prefer phrase matches
If you don't have too much special syntax in your query we'll give perfect phrase matches a boost. I'm being intentionally vague because I'm not sure exactly what "too much special syntax" should be. Right now if you add any explicit phrases to your search we'll turn off this feature.

Fuzzy search
Putting a ~ after a search term (but not double quotes) activates fuzzy search. You can also put a number from 0 to 1 to control the "fuzziness" fraction, e.g. nigtmare~.9 or lighnin~.1 or lighnin~0.1. Closer to one is less fuzzy.

Phrase search and proximity
Surrounding some words with quotes declares that you are searching for those words close together. You can add a ~ and then a number after the second quote to control just how close you mean. The proper name for this "closeness" is "phrase slop". The default "phrase slop" is 1.

Guillemets et recherche exacte
Les guillemets autour de la recherche impliquent qu'elle soit exacte. Vous pouvez ajouter un tilde ~ avant les guillemets pour éviter ce comportement et revenir à celui par défaut.

prefer-recent:
You can give recently edited articles a boost in the search results by adding "prefer-recent:" to the beginning of your search. By default this will scale 60% of the score exponentially with the time since the last edit, with a half life of 160 days. This can be modified like this: "prefer-recent:,". proportion_of_score_to_scale must be a number between 0 and 1 inclusive. half_life_in_days must be greater than 0 but allows decimal points. This number works pretty well if very small. I've tested it around .0001, which is 8.64 seconds.

Ce sera activé par défaut sur Wikinews, mais il n'y a pas de raison à ce que vous ne puissiez pas l'utiliser dans vos recherches.

hastemplate:
You can find pages that use a certain template by adding the filter  to the search. We provide for the usual "syntactic sugar" of template calls. This means the lenient pagename and fullpagename capitalization works, and the main namespace abbreviation, ":" works. For example to find which pages transclude Quality image the full search (in all your preferred namespaces) can be: , and for that same template name in the main namespace, this works. You can omit the quotes if the template title does not contain a space. will filter pages that do not contain that template.

For wikitext that calls a template directly, you can use insource:, but hastemplate: searches the "post-expansion inclusion", so hastemplate: can find a template acting only temporarily as a "secondary template" or "meta-template", which are seen in neither the source nor content, ( but only included as a helper to any other template producing the final content). All content from a template is now reflected in search results is still the relevant philosophy here.

boost-templates:
Vous pouvez accorder une importance plus grande aux pages qui contiennent un modèle donné. Cela peut être réalisé directement dans la recherche via  ou en modifiant le message système   ce qui appliquera cette importance pour toutes les recherches. remplace le contenu de  s'il est spécifié. La syntaxe est un peu étrange mais a été choisie à des fins de simplicité. Quelques exemples :


 * Trouve les fichiers dans la Catégorie:Chine ordonnés d'abord par la qualité des images.
 * Trouve les fichiers dans la Catégorie:Chine ordonnés d'abord par la qualité des images.


 * Find files in the China category sorting quality images first and low quality images last.
 * Find files in the China category sorting quality images first and low quality images last.


 * Find files about popcorn sorting quality images first and low quality images last. Remember that through the use of the  message this can be reduced to just.
 * Find files about popcorn sorting quality images first and low quality images last. Remember that through the use of the  message this can be reduced to just.

Don't try to add decimal points to the percentages. They don't work and search scoring is such that they are unlikely to matter much.

A word of warning about : if you add really really big or small percentages they can poison the full text scoring. Think, for example, if enwiki boosted featured articles by a million percent. Then searches for terms mentioned in featured articles would find the featured articles before exact title matches of the terms. Phrase matching would be similarly blown away so a search like  would find a featured article with those words scattered throughout it instead of the article for Brave New World.

Sorry for the inconsistent  in the name. Sorry again but the quotes are required on this one. Sorry also for the funky syntax. Sorry we don't try to emulate the template transclusion syntax like we do with.

insource:
searches wikitext. It has two flavors: one is delimited by /by slashes/:
 * and
 * These are like regular content search in that they are fast and case-insensitive, but they only recognize letters and numbers and spaces, and ignore the non-alphanumeric characters such as brackets, punctuation marks, or math symbols.


 * and
 * This can pick up template arguments, URLs, links, html etc. They are as thorough and precise as possible because they search wikitext by Regular expressions. They aren't efficient and we only allow a few of them to run at a time on the search cluster, but they are very powerful. The version with the extra   runs the expression case-insensitive, and is even less efficient.


 * Tip: Instead of running insource: searches directly, these return much much faster if they never run alone, but always alongside other items in the query to act as filters results, such as:


 * To refine a regular expression search you should test it against target data on test pages. You can restrict it to subpages of your user page with:
 * To search for regular expression metacharacters literally, you must "escape" them, usually one at a time with a backslash .  You can also escape a set of characters in two ways using delimiters: double-quote-escape, and square-bracket escape. Inside these you can still backslash-escape the double-quote or square bracket characters: for example, , or   which matches a literal dash, dot, or right square bracket. Since a forward slash delimits the entire regexp, you must always escape it inside the regexp.  Inside a template, a regexp search for a pipe character is also template-escaped: the search box version of insource:/\|/ becomes the template version insource/\{ {!}}/. For the metacharacters and there meanings see the explanation of the syntax.  For the formal definition see the Lucene grammar for regular expressions.
 * To search for regular expression metacharacters literally, you must "escape" them, usually one at a time with a backslash .  You can also escape a set of characters in two ways using delimiters: double-quote-escape, and square-bracket escape. Inside these you can still backslash-escape the double-quote or square bracket characters: for example, , or   which matches a literal dash, dot, or right square bracket. Since a forward slash delimits the entire regexp, you must always escape it inside the regexp.  Inside a template, a regexp search for a pipe character is also template-escaped: the search box version of insource:/\|/ becomes the template version insource/\{ {!}}/. For the metacharacters and there meanings see the explanation of the syntax.  For the formal definition see the Lucene grammar for regular expressions.


 * For example, to find usage of a template called Val with an unnamed parameter of three to four digits having a possible minus sign and, on the same page, Val with a named argument "fmt=commas":

Auxiliary text
Cirrus considers some text in the page to be "auxiliary" to what the page is actually about. Examples include table contents, image captions, and "This article is about the XYZ. For ZYX see ZYX" style links. You can also mark article text as auxiliary by adding the  class to the html element containing the text.

Auxiliary text is worth less than the rest of the article text and it is in the snippet only if there are no main article snippets matching the search.

Lead text
Cirrus assumes that non-auxiliary text that is between the top of the page and the first heading is the "lead in" paragraph. Matches from the lead in paragraph are worth more in article ranking.

Commons search
By default when the search contains the file namespace, Cirrus will search commons as well. You can disable this behavior by adding  to the search. If you are using a namespace prefix to select the namespace the syntax looks like. If you aren't using a namespace prefix to select the namespace then the syntax looks like.

Voir aussi

 * Full specifications in the browser tests