Help:CirrusSearch/tr

Wikimedia projelerinde bilgi bulmanın en hızlı yolu, doğrudan aramaktır. Her sayfada bir  kutusu vardır.

CirrusSearch, varsayılan MediaWiki araması üzerinden gelişmiş arama özellikleri sağlamak için Elasticsearch'ı kullanan bir MediaWiki uzantısıdır. Wikimedia Vakfı, tüm Wikimedia projeleri için CirrusSearch kullanmaktadır. Bu sayfa son çözümlere kıyasla yeni veya farklı özellikleri tanımlıyor. Sorunuz burada yanıtlanmadıysa, tartışma sayfasından sormaktan çekinmeyin, birisi sizin için yanıtlayacaktır.

MediaWiki uzantısı hakkında bilgi için sayfasına bakın.

Nasıl çalışır
Anahtar kelimeleri ve cümleleri girin ve klavyenizdeki Enter veya Geri (Return) tuşuna basın. Veya büyüteç simgesini, Ara veya Git düğmesini tıklayın. Bir sayfanın başlığı girdiğinizle aynı ise, o sayfaya yönlendirileceksiniz. Aksi takdirde, vikideki tüm sayfaları arar ve arama terimlerinizle eşleşen maddelerin bir listesini veya hiçbir sayfada tüm anahtar kelimeleri ve cümleleri içermediğini bildiren bir mesaj sunar.

Hiçbir şeyi doldurmadan "" düğmesini tıklarsanız, size ekstra arama seçenekleri sunan "Special:Search" seçeneğine gidersiniz (ayrıca arama sonuçları listesinden de erişilebilir)

Bir aramayı belirli bir ad alanı içindeki sayfalarla sınırlandırmayı yararlı bulabilirsiniz, örneğin, yalnızca     sayfalar içinde arama yapın. Bu arama için ihtiyaç duyduğunuz ad alanlarını kontrol edin.

Neler geliştirildi?
CirrusSearch, varsayılan MediaWiki aramasına göre üç ana iyileştirme sunar:


 * Farklı dillerde arama için daha iyi destek.
 * Arama dizininde daha hızlı güncellemeler, yani maddelerde ki değişiklikler arama sonuçlarına çok daha hızlı yansıtılır.
 * Genişleyen şablonlar, bir şablondaki tüm içeriğin artık arama sonuçlarına yansıtıldığı anlamına gelir.

Arama dizini ne sıklıkla güncellenir?
Arama dizinindeki güncellemeler neredeyse gerçek zamanlı olarak yapılır. Sayfalarda yapılan değişiklikler arama sonuçlarında hemen görünmelidir. Şablonlarda yapılan değişiklikler, şablonu içeren maddelerde birkaç dakika içinde geçerli olacaktır. Şablon değişiklikleri iş kuyruğunu kullanır, bu nedenle performans değişebilir. Maddeye yapılacak bir boş düzenleme, değişikliği zorlayacaktır, ancak her şey yolunda giderse bu gerekli olmamalıdır.

Arama önerileri
Aday sayfaları gösteren arama kutusuna yazdığınızda aldığınız arama önerileri, zor bir madde kalitesi ölçüsüne göre sıralanır. Bu, gelen vikibağlantıların sayısını, sayfanın boyutunu, dış bağlantıların sayısını, başlıkların sayısını ve yeniden yönlendirme sayısını hesaba katar. Arama önerileri atlanabilir ve sorgular doğrudan arama sonuçları sayfasına gider. Sorgudan önce yaklaşık işareti  ekleyin. Örnek "~Frida Kahlo". Arama önerileri görünmeye devam edecek, ancak herhangi bir zamanda Enter tuşuna basmanız sizi arama sonuçları sayfasına götürecektir.

Vurgu/aksan katlama bazı diller için açıktır; ayrıntılar dile özgüdür.

Tam metin arama
"Tam metin araması", bir "indekslenmiş aramadır". Tüm sayfalar viki veritabanında saklanır ve yönlendirilmeyen sayfalardaki tüm sözcükler, pratik olarak vikinin tam metninin indeksi olan arama veritabanında depolanır. Görünür her kelime, bulunduğu sayfaların listesine endekslenir, bu nedenle bir kelimeyi aramak, tek bir kayda bakmak kadar hızlıdır. Ayrıca, ifadelerdeki herhangi bir değişiklik için, arama dizini saniyeler içinde güncellenir.

İhtiyaç duyulan birçok arama türünü kolaylaştırmak için wikinin birçok "tam metni" dizini vardır. Tam vikimetin, birçok özel amaçlı dizine dizilir, her biri vikimetini, kullanımlarını optimize edecek şekilde ayrıştırır. Örnek dizinler şunları içerir:


 * "yardımcı" metin, şapkalar, başlıklar, ToC ve bir HTML özelliği class=searchaux tarafından sınıflandırılan tüm vikimetinleri içerir.
 * "Giriş" metni, sayfanın üst kısmı ile ilk başlık arasında yer alan vikimetindir.
 * "Kategori" metni, en alttaki listeleri dizine ekler.
 * Şablonlar endekslenir. Bir şablonun yansıtılmış sözcükleri değişirse, onu aşan tüm sayfalar güncellenir. (Bu, bir iş kuyruğuna bağlı olarak uzun sürebilir.) Bir şablon tarafından kullanılan alt şablonlar değişirse, dizin güncellenir.
 * Dosya/Ortam ad alanında depolanan belge içerikleri artık dizine alınmıştır. Binlerce format tanınır.

Düzinelerce dil desteği var ancak tüm diller isteniyor. Şu anda desteklenen dillerin bir listesi elasticsearch.org adresinde bulunmaktadır; istekleri veya yamaları göndermek için katkıda bulunma ile ilgili belgelerine bakın. Üçüncü taraf açık kaynak kitaplıkları, Elasticsearch tarafından kapsanmayan ek dilleri desteklemek için de kullanılır.

CirrusSearch sorgunuzu optimize edecek ve çalıştıracaktır. Elde edilen başlıklar, alaka düzeyine göre ağırlıklandırılır ve arama sonuçları sayfası için bir seferde 20 büyük ölçüde sonradan işlenir. Örneğin, maddeden pasajlar toplanır ve arama terimleri kalın metinle vurgulanır.

Arama sonuçlarına genellikle çeşitli ön raporlar eşlik eder. Bunlar, Şunu mu demek istediniz (yazım düzeltmesi) içerir ve başka türlü sonuç bulunamadığında, Şunun için sonuçlar gösteriliyor (sorgu düzeltmesi) ve bunun yerine şunu arayın (sorgunuz) yazar.

Arama özellikleri ayrıca şunları içerir:


 * Gezinme önerilerini gelen bağlantıların sayısına göre sıralama.
 * Sayfa sıralamasını da koruyacak şekilde gezinmeyi ve önerileri devre dışı bırakmak için yaklaşık işareti karakteri  ile başlayarak.
 * Klavye dışı karakterleri klavye karakterlerine normalleştirerek (veya "katlayarak") akıllı eşleştirme karakterleri.
 * Eşleşen kelimeler ve kelime öbekleri, arama sonuçları sayfasında kalın olarak vurgulanmıştır. Vurgulayıcı kozmetik bir analizci iken, arama dizini oluşturma analizörü sayfayı gerçekten bulur ve bunlar, özellikle düzenli ifade için %100 senkronize olmayabilir. Öne çıkaracı, indeksleyiciden daha fazla veya daha az doğru eşleşebilir.

Kelimeler, ifadeler ve değiştiriciler
Temel arama terimi, bir kelime veya "tırnak içindeki kelime öbeği"'dir. Ayrıntılar, özellikle boşluksuz diller için dile göre değişir, ancak arama genellikle bir "sözcüğü" şu şekilde tanır:


 * bir dizi rakam
 * bir dizi harf
 * harfler/rakam geçişleri arasındaki alt kelimeler, örneğin txt2regex gibi
 * camelCase kullanılarak bir componentName içinde alt kelimeler

"Durdurma kelimesi", göz ardı edilen bir kelimedir (yaygın olduğu için veya başka nedenlerle). Durdurma sözcüklerinin listesi dile özgüdür ve tüm diller durdurma sözcüklerini desteklemez. Belirli bir arama terimi "içerik" ile eşleşir (sayfada gösterilir). Bunun yerine vikimetin ile eşleştirmek için insource arama parametresini kullanın (Aşağıdaki bölümü bölümüne bakın). Her arama parametresinin kendi dizini vardır ve verilen terimi kendi yöntemiyle yorumlar.

Kelimeler, tümcecikler, parametreler ve parametrelere giriş arasındaki boşluklar, cömert beyaz boşluk ve gri boşluk karakterleri örneklerini içerebilir. "Gri boşluk karakterleri" alfasayısal olmayan karakterlerin tümü ~!@#$%^&_+-={}|[]\:";'<>?,./ idi. "Gri boşluk karakterleri" ve beyaz boşluk karakterlerinden oluşan karma bir dizi "gri boşluk" olur ve tek bir büyük sözcük sınırı olarak değerlendirilir. Geri boşluk, indekslerin nasıl yapıldığı ve sorguların nasıl yorumlandığıdır.

1) embedded:colon bir kelimedir (bir harf olarak kabul edilir) ve 2) 1,2,3 içinde olduğu gibi gömülü bir sayı olarak, işlenir. Gri boşluk karakterleri, sorgu sözdizimi nedeniyle değiştirici karakterler olarak yorumlanamadıkları sürece yok sayılır.

Değiştiriciler ~ * \? - " ! şeklindedir. Sözdizimindeki yerleşimlerine bağlı olarak bir terime, bir parametreye veya tüm bir sorguya uygulayabilirler. Kelime ve kelime öbeği değiştiriciler joker karakter, yakınlık ve belirsiz aramalardır. Her parametrenin kendi değiştiricileri olabilir, ancak genel olarak:


 * Fuzzy kelime veya belirsiz kelime öbeği aramasının sonuna yaklaşık  karakter (ve dereceyi belirten bir sayı) eklenebilir.
 * Sorgunun ilk teriminin önüne gelen yaklaşık işareti  karakteri, olası gezinme yerine arama sonuçlarını garanti eder.
 * Bir kelimenin içindeki joker karakter (kaçmış) soru işareti olabilir \? sıfır veya daha fazla karakter için bir karakter veya yıldız işareti * karakteri için.
 * Doğruluk mantığı AND ve OR ifadelerini yorumlayabilir, ancak parametreler bunu yapamaz. AND ve OR operatörlerinin şu anda geleneksel doğruluk mantığı tarzında çalışmadığını unutmayın! Ayrıntılar için mantıksal operatörler sayfasına bakın.
 * Doğruluk mantığı, terimin olağan anlamını "eşleştirme" ile "dışlama" çevirmek için bir terimin önüne eklenen $tire veya ! anlar.


 * Kelimelerin etrafındaki tırnaklar "tam kelime öbeği" aramasını işaretler. Parametreler için, çok kelimeli girdiyi sınırlandırmaları da gerekir.
 * Kök oluşturma otomatiktir, ancak "tam bir ifade" kullanılarak kapatılabilir.

Bir kelime öbeği araması, arama motoruna çeşitli ipuçları ile başlatılabilir. Her ipucu yönteminin, kelime dizisinin eşleşmesinin ne kadar toleranslı olacağına dair bir yan etkisi vardır. greyspace, camelCase veya txt2number ipuçları için:


 * words-joined_by_greyspace(characters) veya wordsJoinedByCamelCaseCharacters verildiğinde, çıplak formlarında veya gri boşluk formlarında words joined by ... characters bulur.
 * txt2number,  veya   ile eşleşir.
 * Bir grey_space veya camelCase ifadesinin kenar durumları için (çevrede) durdurma sözcükleri etkinleştirilir. the, of ve a kullanan bir örnek, the_invisible_hand_of_a ile  metni içinde   ile eşleşmesidir.

Bir kelime öbeğinde evrensel olarak bilinmeyen bir kelime göz ardı edildiğinde "bunun yerine arama" raporu tetiklenir.

Aşağıdaki öbek eşleme türlerinin her biri, bir önceki eşleme toleranslarını içerir ve genişletir:


 * Tırnak içindeki bir "tam kelime öbeği", gri alana tolerans gösterecektir (eşleşecektir). "exact_phrase" veya "exact phrase" verildiğinde,  ile eşleşir.
 * Bir greyspace_phrase, kök oluşturmayı ve "durdurma kelimesi" kontrollerini başlatır.
 * CamelCase verildiğinde, "ek olarak"  ile eşleşecektir, çünkü CirrusSearch eşleşmede büyük/küçük harfe duyarlı değildir. CamelCase eşleşmesinin tüm diller için etkinleştirilmediğini unutmayın.

Bazı parametreler gri boşluk ifadelerini yorumlar, ancak  gibi diğer parametreler yalnızca olağan "tırnak içindeki öbeği" yorumlar.

Tüm gövde oluşturmanın büyük/küçük harfe duyarlı olmadığını unutmayın.

"Tam kelime öbeği" aramasının embedded:colon karakterini bir harf olarak nasıl yorumladığına, ancak embedded_underscore karakterini nasıl yorumladığına dikkat edin. Bir sayının içinde virgül, karakteriyle benzer bir olay meydana gelir.

Given, CirrusSearch, when in an "exact phrase" context, (which includes the insource parameter context), will not match  ,  , or  , but will then only match.

Otherwise, remember that for CirrusSearch words are letters, numbers, or a combination of the two, and case does not matter.

The common word search employs the space character and is aggressive with stemming, and when the same words are joined by greyspace characters or camelCase they are aggressive with phrases and subwords.

When common words like "of" or "the" are included in a greyspace-phrase, they are ignored, so as to match more aggressively.

A greyspace_phrase search term, or a camelCase, or a txt2number term, match the signified words interchangeably. You can use any of those three forms. Now camelcase matches camelCase because Search is not case sensitive, but camelCase matches camelcase because camelCase is more aggressive. Like the rest of Search, subword "words" are not case-sensitive. By comparison the "exact phrase" is greyspace oriented and ignores numeric or letter-case transitions, and stemming. "Quoted phrases" are not case sensitive.

From the table we can surmise that the basic search parser_function -"parser function" is the sum of the basic searches  and.

Making inquiries with numbers, we would find that:


 * Plan9 or Plan_9 matches any of:,  ,  ,  ,
 * "plan9" only matches  (case insensitive)
 * Plan*9 matches  or.

The star * wildcard matches a string of letters and digits within a rendered word, but never the beginning character. One or more characters must precede the * character.


 * When * matches numbers, a comma is considered part of one number, but the decimal point is considered a greyspace character, and will delimit two numbers.
 * Inside an "exact phrase" * is treated as a greyspace character and not a wild card character, so it delimits words.

The \? wildcard represents one letter or number; *\? is also accepted, but \?* is not recognized.

The wildcards are for basic word, phrase, and insource searches, and may also be an alternative to (some) advanced regex searches (covered later).

Putting a tilde ~ character after a word or phrase activates a fuzzy search.


 * For a phrase it is termed a proximity search, because proximal words are tolerated to an approximate rather than exact phrase.
 * For example, "exact one two phrase"~2 matches.
 * For a word it means extra characters or changed characters.
 * For a phrase a fuzzy search requires a whole number telling it how many extra words to fit in, but for a word a fuzzy search can have a decimal fraction, defaulting to word~0.5 ( word~.5 ), where at most two letters can be found swapped, changed, or added, but never the first two letters.
 * For a proximity phrase, a large number can be used, but that is an "expensive" (slow) search.
 * For a word word~2 is most fuzzy with an edit distance of 2 (default), and word~1 is least fuzzy, and word~0 is not fuzzy at all.

For the closeness value necessary to match in reverse (right to left) order, count and discard all the extra words, then add twice the total count of remaining words minus one. (In other words, add twice the number of segments). For the full proximity algorithm, see Elasticsearch slop.

Quotes turn off stemming, "but appending"~ the tilde reactivates the stemming.

Insource
Insource searches can be used to find any one word rendered on a page, but it's made for finding any phrase you might find - including MediaWiki markup (aka wikicode), on any page except redirects. This phrase completely ignores greyspace: insource: "state state autocollapse" matches.

Insource complements itself. On the one hand it has full text search for any word in the wikitext, instantly. On the other hand it can process a regexp search for any string of characters. Regexes scan all the textual characters in a given list of pages; they don't have a word index to speed things up, and the process is interrupted if it runs for more than twenty seconds. Regexes run last in a query, so to limit needless character-level scanning, every regex query should include other search terms to limit the number of documents that need to be scanned. Often the best candidate to add to the regex query insource:/arg/ is insource:arg, where arg is the same (and uses no wildcards).

The syntax for the regexp is insource: no space, and then /regexp/. (No other parameter disallows a space. All the parameters except insource:/regexp/ accept space after their colon.)

Insource indexed-search and regexp-search roles are similar in many respects:


 * Both search wikitext only.
 * Neither finds things "sourced" by a transclusion.
 * Neither does stemmed, fuzzy, or proximity searches.
 * Both want the fewest results, and both work faster when accompanied by another clause.

But indexed searches all ignore greyspace; wildcards searches do not match greyspace, so regexes are the only way to find an exact string of any and all characters, for example a sequence of two spaces. Regexes are an entirely different class of search tool that make matching a literal string easy (basic, beginner use), and make matching by metacharacter expressions possible (advanced use) on the wiki. See below.

Prefix and namespace
For Search, a namespace term functions to specify the initial search domain. Instead of searching the entire wiki, the default is the main namespace (mainspace).

Only one namespace name can be set from the search box query. It is either the first term or in the last term, in a prefix parameter.

Two or more namespaces may be searched from the Advanced pane of the search bar found on the top of every search results page, Special:Search. Your search domain, as a profile of namespaces, can be set here. The namespaces list will then present itself on the first page of future search results to indicate the search domain of the search results. To unset this, select the default namespace (shown in parentheses), select "Remember", and press Search.

The search bar graphically sets and indicates a search domain. "Content pages" (mainspace), "Multimedia" (File), "Everything" (all plus File), "Translations", etc., are hyperlinks that can activate the query in that domain, and then indicate this by going inactive (dark). But the query will override the search bar. When a namespace or prefix is used in the query the search bar activations and indications may be misleading, so the search bar and the search box are mutually exclusive (not complementary) ways to set the search domain.

A namespace term overrides the search bar, and a prefix term overrides a namespace.

Enter a namespace name, or enter, or enter a     colon for mainspace. All does not include the File namespace. File includes media content held at Commons such as PDF, which are all indexed and searchable.

When File is involved, a namespace modifier  has an effect, otherwise it is ignored.

Namespace aliases are accepted.

As with search parameters, local and all must be lowercase. Namespaces names are case insensitive.

The prefix: parameter matches any number of first-characters of all pagenames in one namespace. When the first letters match a namespace name and colon, the search domain changes.

Given a namespace only, prefix will match all its pagenames. Given one character only, it cannot be - dash or ' quote or " double quote. The last character cannot be a colon.

For pagenames that match, their subpage titles match by definition.

The prefix parameter does not allow a space before a namespace, but allows whitespace before a pagename.

The prefix parameter goes at the end so that pagename characters may contain " quotation marks.

The Translate extension creates a sort of "language namespace", of translated versions of a page. But unlike namespace or prefix, which create the initial search domain, the inlanguage parameter is a filter of it. (See the next section.)

Exclude content from the search index
Content can be excluded from the search index by adding. This will instruct CirrusSearch to ignore this content from the search index (see for more context).

Additionally content can be marked as auxiliary information by adding. This will instruct CirrusSearch to move the content from the main text to an auxiliary field which has lower importance for search and snippet highlighting. This distinction is used for items such as image thumbnail descriptions, 'see also' sections, etc.

Filters
A filter will have multiple instances, or negated instances, or it can run as a standalone filtering a search domain. A query is formed as terms that filter a search domain.

Adding another word, phrase, or parameter filters more. A highly refined search result may have very many Y/N filters when every page in the results will be addressed. (In this case ranking is largely irrelevant.) Filtering applies critically to adding a regex term; you want as few pages as possible before adding a regex (because it can never have a prepared index for its search).

A namespace is a specified search domain but not a filter because a namespace will not run standalone. A prefix will negate so it is a filter. The search parameters below are filters for which there may be multiple instances.

Insource (covered above) is also a filter, but insource:/regexp/ is not a filter. Filters and all other search parameters are lowercase. (Namespaces are an exception, being case insensitive.)

Intitle and incategory
Word and phrase searches match in a title and match in the category box on bottom of the page. But with these parameters you can select titles only or category only.
 * cow*
 * Find articles whose title or text contains words that start with cow
 * intitle:foo
 * Find articles whose title contains foo. Stemming is enabled for foo.
 * intitle:"fine line"
 * Find articles whose title contains fine line. Stemming is disabled.
 * intitle:foo bar
 * Find articles whose title contains foo and whose title or text contains bar.
 * -intitle:foo bar
 * Find articles whose title does not contain foo and whose title or text contains bar.
 * incategory:Music
 * Find articles that are in Category:Music
 * incategory:"music history"
 * Find articles that are in Category:Music_history
 * 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

Intitle and incategory are old search parameters. Incategory no longer searches any subcategory automatically, but you can now add multiple category pagenames manually.

Since Regular expression searches are supported for intitle:
 * intitle:/regex/, intitle:/regex/i

Everything written in the #Regular expression searches is also valid for these searches, including warnings.

Deepcategory
Deep category search allows to search in category and all subcategories. The depth of the tree is limited by 5 levels currently (configurable) and the number of categories is limited by 256 (configurable). The deep search uses SPARQL Category service from WDQS. Keywords are deepcategory or deepcat. Example:


 * deepcat:"musicals"
 * Find articles that are in Category:Musicals or any of the subcategories.

The DeepCat gadget that previously implemented the parameter was sunsetted in January 2020.

Note that some deepcat searches return incomplete results. See bug for more details.

Linksto
Linksto finds wikilinks to a given name, not links to content. The input is the canonical, case sensitive, page name. It must match the title line of the content page, exactly, before any title modifications of the letter-case. (It must match its { {FULLPAGENAME}}, e.g. .)

Linksto does not find redirects. It only finds [ [wikilinks]], even when they are made by a template. It does not find a link made by a URL, even if that URL is an internal wiki link.

To find all wikilinks to a "Help:Cirrus Search", if "Help:Searching" and "H:S" are redirects to it:
 * 1) linksto: "Help:Cirrus Search"
 * 2) linksto: Help:Searching
 * 3) linksto: H:S

finds articles that mention "CirrusSearch" but not in a wikilink.

Hastemplate
You can specify template usage with. Input the canonical pagename to find all usage of the template, but use any of its redirect pagenames finds just that naming. Namespace aliases are accepted, capitalization is entirely ignored, and redirects are found, all in one name-search. (Compare boost-template no default namespace; linksto no namespace aliases, case-sensitive, no redirects; intitle no redirects.)

Hastemplate finds secondary (or meta-template) usage on a page: it searches the post-expansion inclusion. This is the same philosophy as for words and phrases from a template, but here it's for templates from a template. The page will be listed as having that content even though that content is not seen in the wikitext.


 * hastemplate: "quality image", finds "Template:Quality image" usage in your default search domain (namespaces).
 * hastemplate: portal:contents/tocnavbar, finds mainspace usage of a "Contents/TOCnavbar" template in the Portal namespace.

For installations with the Translate extension, hastemplate searches get interference wherever Template:Translatable template name wraps the template name of a translatable template. Use insource instead.

Inlanguage
For installations with the Translate extension, inlanguage is important for highly refined searches and page counts.


 * inlanguage:  language code 

will produce search results in that language only.

For example


 * to count all Japanese pages on the wiki
 * all: inlanguage: ja


 * to filter out German and Spanish pages in the Help namespace
 * help: -inlanguage: de -inlanguage: es


 * to ignore Translate, and where English is the base language, add
 * inlanguage:en

Contentmodel
The contentmodel: keyword allows to limit the search to pages of a specific content model. For possible models cf. Content handlers. E.g.:


 * To see only JSON pages:
 * contentmodel:json

subpageof
To find sub-pages.
 * subpageof:  ParentPage 

For example


 * To find all subpages of CirrusSearch.
 * subpageof:CirrusSearch


 * Use double quotes if the parent page contains spaces.


 * subpageof:"Requests for comment"

Articletopic
The articletopic: keyword allows filtering search results by topic. For possible topics see. E.g. articletopic:books will filter the search results to articles about books. articletopic:books|films will filter to articles about books or films. articletopic:books articletopic:films will filter to articles which are about both books and films.

Only mainspace articles belong into topics, and topics are only available on Wikipedias. Unlike other filters, articletopic also does page weighting: articles which are a stronger match for a topic will be higher in the search results (while articles which aren't about that subject at all will be removed from the result set completely).

Topic models are derived via machine learning from ORES. Any given article receives a score on dozens of different topics, and therefore may appear under different keywords. For instance, the article on Albert Einstein may appear as a "physics" article and a "biography" article. All Wikipedias have scores available -- some have local-language topic models that have coverage on all articles. Other languages do not have local ORES models, and are using English-language scores assigned to articles in the local language that also exist in English Wikipedia. The languages with such "cross-wiki" scores do not have 100% coverage -- depending on the language, it may only be something like 60% of articles that have topics available.

Topic-related search data is updated weekly, so recently created articles might not show up in topic-based search queries.

Page weighting
Weighting determines snippet, suggestions, and page relevance. The normal weight is one. Additional weighting is given through multipliers.

If the query is just words, pages that match them in order are given a boost. If you add any explicit phrases to your search, or for certain other additions, this "prefer phrase" feature is not applied.

Morelike

 * morelike:page name 1|page name 2|...|page name n
 * Find articles whose text is most similar to the text of the given articles.
 * morelike:wasp|bee|ant
 * Find articles about stinging insects.
 * morelike:template:search|template:regex|template:usage
 * Find templates about regex searching for template usage on the wiki.

morelike is a "greedy" keyword, meaning that it cannot be combined with other search queries. If you want to use other search queries, use morelikethis in your search:


 * morelikethis:bee hastemplate:"featured article"
 * Find articles about bees that also have the "featured article" template.

The morelike: 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:

These settings can be made persistent by overriding  in System message.
 * cirrusMltMinDocFreq : Minimum number of documents (per shard) that need a term for it to be considered.
 * cirrusMltMaxDocFreq : Maximum number of documents (per shard) that have a term for it to be considered.
 * cirrusMltMaxQueryTerms : Maximum number of terms to be considered.
 * cirrusMltMinTermFreq : Minimum number of times the term appears in the input to doc to be considered. For small fields ( title ) this value should be 1.
 * cirrusMltMinWordLength : Minimal length of a term to be considered. Defaults to 0.
 * cirrusMltMaxWordLength : The maximum word length above which words will be ignored. Defaults to unbounded (0).
 * cirrusMltFields (comma separated list of values): These are the fields to use. Allowed fields are title, text , auxiliary_text , opening_text , headings and all.
 * cirrusMltUseFields ( | ): use only the field data. Defaults to : the system will extract the content of the   field to build the query.
 * cirrusMltPercentTermsToMatch : The percentage of terms to match on. Defaults to 0.3 (30 percent).
 * Example:

Prefer-recent
Adding prefer-recent: anywhere in the query gives recently edited articles a slightly larger than normal boost in the page-ranking rules. Prefer-recent is only applied when using the default  sort order.

It defaults to boost only 60% of the score, in a large, 160 day window of time, which can be entered in the query as prefer-recent:0.6,160. This plays well with other page ranking rules, and is intended for most searches.

You can manipulate the rules: prefer-recent:boost,recent Technically "boost" is the proportion of score to scale, and "recent" is the half life in days. The boost is more than the usual multiplier, it is an exponential boost. The factor used in the exponent is the time since the last edit.

For example


 * prefer-recent:,7

Pages older than 7 days are boosted half as much, and pages older than 14 days are boosted half as much again, and so on. For a simple "sort by date" in highly refined search results, where page ranking and boosting are largely meaningless, just boost the entire score.
 * prefer-recent:1,7 (weeks)
 * prefer-recent:1,1 (days)
 * prefer-recent:1,0.0007 (minutes)
 * prefer-recent:1,0.0001 (8.64 seconds)
 * prefer-recent:1,0.00001 (seconds)

Boost-templates
You can boost pages' scores based on what templates they contain. This can be done directly in the search via  or you can set the default for all searches via the   message. replaces the contents of  if the former is specified. The syntax is a bit funky but was chosen for simplicity. Like prefer-recent, boost-templates is only applied when using the default  sort order. Some examples:


 * File:boost-templates:"Template:Quality Image|200%" incategory:china
 * Find files in the China category sorting quality images first.


 * File:boost-templates:"Template:Quality Image|200% Template:Low Quality|50%" incategory:china
 * Find files in the China category sorting quality images first and low quality images last.


 * File:boost-templates:"Template:Quality Image|200% Template:Low Quality|50%" popcorn
 * 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.

Regular expression searches
A basic indexed-search finds words rendered visible on a page. Hyphenation and punctuation marks and bracketing, slash and other math and computing symbols, are merely boundaries for the words. It is not possible to include them in an indexed search.

These return much much faster when you limit the regexp search-domain to the results of one or more index-based searches.

An "exact string" regexp search is a basic search; it will simply "quote" the entire regexp, or "backslash-escape" all non-alphanumeric characters in the string. All regexp searches also require that the user develop a simple filter to generate the search domain for the regex engine to search:


 * insource:"debian.reproducible.net" insource: / debian\.reproducible\.net / 
 * insource:"c:\program files (x86)" insource: / C\:\\Program Files \(x86\) /i 
 * insource:"{ {template}}" insource: / "{ {template}}<\/tag>" /
 * insource:"[ [title|link label]]'s" insource: / "[ [title|link label]]'s" /
 * insource: / regexp / prefix:{ {FULLPAGENAME}}

The last example works from a link on a page, but { {FULLPAGENAME}} doesn't function in the search box.

For example: Special:Search/insource:/regex/ prefix: finds the term regex on this page.

A query with no namespace specified and no prefix specified searches your default search domain, (settable on any search-results page, i.e. at Special:Search). Some users keep their default search domain at "all namespaces", i.e. the entire wiki. On a large wiki if this user does a bare regexp search it will probably fail, incurring an HTML timeout, before completing the search.

A regex search actually scours each page in the search domain character-by character. By contrast, an indexed search actually queries a few records from a database separately maintained from the wiki database, and provides nearly instant results. So when using an insource:// (a regexp of any kind), consider creating one the other search terms that will limit the regex search domain as much as possible. There are many search terms that use an index and so instantly provide a more refined search domain for the /regexp/. In order of general effectiveness:


 * insource:"" with quotation marks, duplicating the regexp except without the slashes or escape characters, is ideal.
 * intitle (without regex search), incategory, and linksto are excellent filters.
 * hastemplate: is a very good filter.
 * "word1 word2 word3", with or without the quotation marks, are good.
 * namespace: is practically useless, but may enable a slow regexp search to complete.

To test a bare regexp query you can create a page with test patterns, and then use the prefix parameter with that fullpagename. The match will be highlighted. It searches that page (in the database) and its subpages.

Search terms that do not increase the efficiency of a regexp search are the page-scoring operators: morelike, boost-template, and prefer-recent.

Metacharacters
This section covers how to escape metacharacters used in regexp searches For the actual meaning of the metacharacters see the explanation of the syntax.

For example:


 * to search a namespace, gauge the number of pages with a single term that is a namespace. This will list the number of pages in that namespace.
 * starting out to find again what you may have seen, like "wiki-link" or "(trans[in]clusion)" start with namespace and insource filters.

Refining with an exact string

 * refinining an ongoing search process with what you want to see, like "2 + 2 = 4", or "site.org" This is ideally the best use of regex, because it adds it as a single regexp term while refining a search, the limited number of pages the regexp must crawl is can be seen.

You can start out intending an exact string search, but keep in mind:


 * regex only search the wikitext not the rendered text, so there are some differences around the markup, and even the number of space characters must match precisely.
 * You are obligated to supply an accompanying filter.
 * You must learn how to escape regex metacharacters.

There are two ways to escape metacharacters. They are both useful at times, and sometimes concatenated side-by-side in the escaping of a string.


 * Backslash-escape one of them \char. The insource:/regexp/ uses slashes to delimit the regexp. Giving /reg/exp/ is ambiguous, so you must write /reg\/exp/.
 * Put a string of them in double quotes "string". Because escaping a character can't hurt, you can escape any character along with any possible metacharacters in there. Escaping with quotes is cleaner.
 * You can't mix methods, but you can concatenate them.

Double-quotes escaping using insource:/"regexp"/ is an easy way to search for many kinds of strings, but you can't backslash-escape anything inside a double-quoted escape.


 * instead of
 * is as good as
 * But  always.
 * And .  It finds the   literally, which is not the   you probably wanted.

Backslash-escape using insource:/regexp/ allows escaping the " and / delimiters, but requires taking into account metacharacters, and escaping any:


 * To match a  delimiter character use.
 * To match a  delimiter character use.
 * The escaped metacharacters would be.
 * The equivalent expression escaped with double-quotes is.

The simplest algorithm to create the basic string-finding expression using insource:/"regexp"/, need not take metacharacters into account except for the " and / characters:
 * 1) Write   out. (The /" delimiters "/ are not shown.)
 * 1) Replace   with   (previous double-quote: stop, concatenate, quote restart).
 * 1) Replace   with   (stop, concatenate, start).
 * 1) You get , showing concatenation of the two methods.

The square-bracket notation for creating your own character-class also escapes its metacharacters. To target a literal right square bracket in your character-class pattern, it must be backslash escaped, otherwise it can be interpreted as the closing delimiter of the character-class pattern definition. The first position of a character class will also escape the right square bracket. Inside the delimiting square brackets of a character class, the dash character also has special meaning (range) but it too can be included literally in the class the same way as the right square bracket can. For example both of these patterns target a character that is either a dash or a right square bracket or a dot:  or.

For general examples using metacharacters:


 * insource:"2+2=4" insource:/"2+2=4"/ matches "2 + 2 = 4", with zero spaces between the characters.
 * insource:"2 + 2 = 4" insource:/2 ?\+ ?2 ?= ?4\./ match with zero or one space in between. The equals = sign is not a metacharacter, but the plus + sign is.
 * insource:"[ [link|2\3?]]\" insource:/"[ [link|2\3?]]< "\/" tag>"/

There are some notable differences from standard regex metacharacters:

To search for a string that contains a newline, you can do a search like  which means not a curly brace, then two curly braces, then any two characters except a curly brace, space, or pipe, then a  tag. The "any character except" will include a newline in the search. Note thas this search was designed only to match to the following string:
 * The  or   are not reserved for matching a newline.


 * The dot . metacharacter stands for any character including a newline, so .* matches across lines.
 * The number # sign means something, and must be escaped.
 * The ^ and $ are not needed. Like "grep" (global per line, regular expression, print each line), each insource:// is a "global per document, regular expression, search-results-list each document" per document.
 * and  support a multi-digit numeric range like   does, but without regard to the number of character positions, or the range in each position, so   works, and even   works.

Regex on titles
The insource keyword does only search the page source content. To run regex searches on the title strings intitle:/regex/ can be used.

Advanced example
For example, using metacharacters to find the usage of a template called Val having, inside the template call, an unnamed parameter containing a possibly signed, three to four digit number, possibly surrounded by space characters, and on the same page, inside a template Val call, a named argument  having any allowable spaces around it, (it could be the same template call, or a separate one):



Note that the = sign in "fmt commas" is not needed but that adding it would not change the search results. It is fast because it uses two filters so that every page the regexp crawls has the highest possible potential.

bounded
You can limit search to pages identified as being near some specified geographic coordinates. The coordinates can either be specified as a, pair, or by providing a page title from which to source the coordinates. A distance to limit the search to can be prepended if desired. Examples:


 * neartitle:"San Francisco"
 * neartitle:"100km,San Francisco"
 * nearcoord:37.77666667,-122.39
 * nearcoord:42km,37.77666667,-122.39

boosted
You can alternatively increase the score of pages within a specified geographic area. The syntax is the same as bounded search, but with boost- prepended to the keyword. This effectively doubles the score for pages within the search range, giving a better chance for nearby search results to be near the top.


 * boost-neartitle:"San Francisco"
 * boost-neartitle:"100km,San Francisco"
 * boost-nearcoord:37.77666667,-122.39
 * boost-nearcoord:42km,37.77666667,-122.39

File properties search
Since MediaWiki 1.28, CirrusSearch supports indexing and searching of properties of files in the  namespace. This includes:
 * file media type
 * MIME type
 * size
 * width & height
 * resolution
 * bit depth for files that support these

filetype
Searching for file type allows to retrieve files according to their classification, such as office documents, videos, raster images, vector images, etc. The following types currently exist:



This list may be extended in the future. See also  constants in.

The syntax of the search is: filetype:{type}. Example:

filetype:video - looks for all videos

The filetype search is not case-sensitive.

filemime
Matches file MIME type. The syntax is:

filemime:{MIMEtype} - look for files of this MIME type

The argument can be quoted to specify exact match. Without quotes, partial matches to components of MIME type will be accepted too.

Examples:


 * filemime:"image/png" - look for files with MIME type exactly
 * filemime:pdf - look for all PDF documents
 * -filemime:pdf - skip all PDF documents (notably on Commons)

The MIME type search is not case sensitive.

filesize
Search for file of given size, in kilobytes (kilobyte means 1024 bytes). The syntax is:


 * filesize:{number} or filesize:>{number} - file with size at least given number
 * filesize:<{number} - file with size no more than given number
 * filesize:{number},{number} - file with size between given numbers

Examples:


 * filesize:>20 or filesize:20 - files 20KB and bigger
 * filesize:<1024 - files smaller than 1MB
 * filesize:100,500 - files with sizes between 100KB and 500KB

File measures
It is possible to search for specific file measures: width, height, resolution (which is defined as square root of height × width), and bit depth. Not all files may have these properties. The syntax is:


 * {measure}:{number} - file with measure that equals to given number
 * {measure}:>{number} - file with measure that is at least given number
 * {measure}:<{number} - file with measure that is no more than given number
 * {measure}:{number},{number} - file with measure that is between given numbers

Where  can be:

filew or filewidth - file width

fileh or fileheight - file height

fileres - file resolution (see above)

filebits - file bit depth

Examples:

filew:>800 fileh:>600 - files that are at least 800x600 pixels in size

filebits:16 - files with 16-bit color depth

fileheight:100,500 - file between 100 and 500 pixels high

Wikibase search
The extension defines some search keywords in order to make it easier to search for certain Wikibase items. This is useful on and other Wikibase sites, including to search for images with Structured data on Wikimedia Commons. See for details.

Cross-wiki search results
The search on Wikimedia projects includes improved cross-wiki search results (also known as interwiki search results, sister projects search results).

Explicit sort orders
In addition to the default relevance based sort CirrusSearch can provide results a few other explicit sort orders. Specifying a sorting order other than  will disable all search keywords that affect scoring, such as   or. The keywords will still be parsed, but they will have no effect.

Sorting options are currently available from the MediaWiki API by providing the  parameter.

Sorting options can be manually added to a search URL by adding, for example https://www.mediawiki.org/w/index.php?search=foo&sort=last_edit_desc.

Valid sort orders include:

Interface for advanced options


The AdvancedSearch extension adds an improved interface to the search page allowing the use of several options described above in a user-friendly manner. See here for the user manual.