Server logs

In server logs, Yandex robots are represented as follows:.

Query language

The following operators are used to configure:

Search results

Yandex automatically, along with the original "exact form" of the query, searches for its various variations and formulations.[8]​.

Yandex search takes into account the morphology of the Russian language, therefore, regardless of the form of the word in the search query, the search will be performed for all forms of the word. If morphological analysis&action=edit&redlink=1 "Morphological analysis (problem-solving) (not yet written)") is not desirable, you can place an exclamation point (!) before the word; The search in this case will show only the specific form of the word. Furthermore, the search query practically does not take into account so-called stop words, i.e. prepositions), punctuation, pronouns, etc., due to their wide distribution[6].

As a rule, abbreviations are revealed automatically, spelling is corrected. Also look for synonyms (mobile - cell phone). The extent of the original user's request depends on the context. The expansion does not occur when a set of very specialized terms, names of proper names of companies (for example, OJSC “Hippopotamus” - OJSC “Hippopotamus”), adding the word “price”, in exact quotes (these are queries highlighted with typewriter quotes).[8]​.

Search results for each user are formed individually based on their location, the language of a query, interests and preferences based on the results of previous and current search sessions. However, the key factor in ranking search results is their relevance to the search query. Relevance is determined based on a ranking formula, which is constantly updated based on machine learning algorithms.

The search is carried out in Russian, English, French, German, Ukrainian, Belarusian, Tatar, Kazakh.

Search results can be sorted by relevance and by date (buttons below search results).

The page with search results consists of 10 links with short annotations - "snippets". Snippets include a text comment, link, address, popular sections of the site, pages on social networks, etc.[9] As an alternative to snippets, Yandex introduced a new interface called "Islands" in 2014.

Yandex implements the "parallel searches" mechanism, when along with a web search, a search is carried out in Yandex services, such as Catalog, News, Market, Encyclopedias, Images, etc. As a result, in response to a user's request, the system displays not only textual information, but also links to video files, images, dictionary entries, etc.

A distinctive feature of the search engine is also the "intent search" technology, which means a search to solve a problem. Intent search elements are: dialog messages in case of ambiguous request, automatic text translation, information about the characteristics of the requested car, etc. For example, when you request "Boris Grebenshchikov - Golden City", the system will display a form for listening to music online from the Yandex Music service"), at the request of "st. Koroleva 12 ", a fragment of the map with the object marked on it will be displayed.

Protection against spam and viruses

In 2013, Yandex was considered by some to be the safest search engine at the time and the third safest among all web resources.[10]​ By 2016, Yandex had fallen to third place with Google in first place.[11]​.

Checking web pages and warning users appeared on Yandex in 2009: since then, on the search results page, next to a dangerous site there is a note "This site may threaten the security of your computer." Two technologies are used at the same time to detect threats. The first was purchased from the American antivirus Sophos") and was based on a signature approach: that is, when accessing a web page, the antivirus system also accesses a database of already known viruses and malware. This approach is fast, but practically powerless against new viruses that have not yet entered the database. Therefore, Yandex, together with the firm, also uses its own antivirus complex, based on an analysis of the behavioral factor. The Yandex program, when accessing the site, checks whether the latter requested additional files from the browser, redirected it to a foreign resource, etc. Therefore, if information is received that the site begins to perform certain actions (cascading style sheets, JavaScript modules are launched and complete programs) without the user's permission, it is placed on the "black list" and in the virus signature database.[12]​ Information about the infection of the site appears in the search results, and through the Yandex.Webmaster service, the Site owner receives a notification. After the first check, Yandex performs the second, and if the infection information is confirmed a second time, the checks will be more frequent until the threat is removed. The total number of infected sites in the Yandex database does not exceed 1%.

Every day in 2013, Yandex checks 23 million web pages (while detecting 4,300 dangerous sites) and shows users 8 million warnings.[13] Approximately one billion sites are reviewed monthly.

Search classification

For a long time, the key ranking factor for Yandex was the number of third-party links to a particular site. Each Internet page was assigned a unique citation index, similar to the author index of scientific articles: the more links, the better. A similar mechanism was implemented in Yandex and Google Pagerank. To avoid cheating, Yandex uses multivariate analysis, in which only 70 out of 800 factors are affected by the number of third-party links. Today, the content of the site and the presence or absence of keywords on it, the readability of the text, the domain name, its history and the presence of multimedia content play a much more important role.

On December 5, 2013, Yandex announced that it completely refused to account for the link factor in the future.[14]​.

Search Suggestions

As the user types the query into the search bar, the search engine offers suggestions in the form of a drop-down list. Suggestions appear even before search results appear, allowing you to refine your query, correct a layout or typo, or go directly to the site you're looking for. For each user, suggestions are generated based on the history of their search queries using the My Findings service. In 2012, the so-called "Smart Search Tips" appeared, which provide instant information about the main constants (longitude of the equator, speed of light, etc.), traffic jams and have a built-in calculator. In addition, a translator was integrated into the "Suggestions" (the query "love in French" instantly gives amour, affection), the calendar and results of football matches, exchange rates, weather forecasts and much more. You can find out the exact time by asking "what time is it." In 2011, Yandex search suggestions became completely local in 83 regions of Russia.[15]​.

In addition to the actual search, suggestions are built into Yandex search engines. Dictionaries "," Yandex Mercado") ”,“ Yandex Maps "and other Yandex services.

The hint function is a consequence of the development of intentional search technology and first appeared on Yandex.Bar in August 2007, and in October 2008 it was introduced to the main page of the search engine. Available on desktop and mobile versions of the site, Yandex shows its users more than 1 billion search suggestions per day.

Server logs

In server logs, Yandex robots are represented as follows:.

Query language

The following operators are used to configure:

Search results

Yandex automatically, along with the original "exact form" of the query, searches for its various variations and formulations.[8]​.

Yandex search takes into account the morphology of the Russian language, therefore, regardless of the form of the word in the search query, the search will be performed for all forms of the word. If morphological analysis&action=edit&redlink=1 "Morphological analysis (problem-solving) (not yet written)") is not desirable, you can place an exclamation point (!) before the word; The search in this case will show only the specific form of the word. Furthermore, the search query practically does not take into account so-called stop words, i.e. prepositions), punctuation, pronouns, etc., due to their wide distribution[6].

As a rule, abbreviations are revealed automatically, spelling is corrected. Also look for synonyms (mobile - cell phone). The extent of the original user's request depends on the context. The expansion does not occur when a set of very specialized terms, names of proper names of companies (for example, OJSC “Hippopotamus” - OJSC “Hippopotamus”), adding the word “price”, in exact quotes (these are queries highlighted with typewriter quotes).[8]​.

Search results for each user are formed individually based on their location, the language of a query, interests and preferences based on the results of previous and current search sessions. However, the key factor in ranking search results is their relevance to the search query. Relevance is determined based on a ranking formula, which is constantly updated based on machine learning algorithms.

The search is carried out in Russian, English, French, German, Ukrainian, Belarusian, Tatar, Kazakh.

Search results can be sorted by relevance and by date (buttons below search results).

The page with search results consists of 10 links with short annotations - "snippets". Snippets include a text comment, link, address, popular sections of the site, pages on social networks, etc.[9] As an alternative to snippets, Yandex introduced a new interface called "Islands" in 2014.

Yandex implements the "parallel searches" mechanism, when along with a web search, a search is carried out in Yandex services, such as Catalog, News, Market, Encyclopedias, Images, etc. As a result, in response to a user's request, the system displays not only textual information, but also links to video files, images, dictionary entries, etc.

A distinctive feature of the search engine is also the "intent search" technology, which means a search to solve a problem. Intent search elements are: dialog messages in case of ambiguous request, automatic text translation, information about the characteristics of the requested car, etc. For example, when you request "Boris Grebenshchikov - Golden City", the system will display a form for listening to music online from the Yandex Music service"), at the request of "st. Koroleva 12 ", a fragment of the map with the object marked on it will be displayed.

Protection against spam and viruses

In 2013, Yandex was considered by some to be the safest search engine at the time and the third safest among all web resources.[10]​ By 2016, Yandex had fallen to third place with Google in first place.[11]​.

Checking web pages and warning users appeared on Yandex in 2009: since then, on the search results page, next to a dangerous site there is a note "This site may threaten the security of your computer." Two technologies are used at the same time to detect threats. The first was purchased from the American antivirus Sophos") and was based on a signature approach: that is, when accessing a web page, the antivirus system also accesses a database of already known viruses and malware. This approach is fast, but practically powerless against new viruses that have not yet entered the database. Therefore, Yandex, together with the firm, also uses its own antivirus complex, based on an analysis of the behavioral factor. The Yandex program, when accessing the site, checks whether the latter requested additional files from the browser, redirected it to a foreign resource, etc. Therefore, if information is received that the site begins to perform certain actions (cascading style sheets, JavaScript modules are launched and complete programs) without the user's permission, it is placed on the "black list" and in the virus signature database.[12]​ Information about the infection of the site appears in the search results, and through the Yandex.Webmaster service, the Site owner receives a notification. After the first check, Yandex performs the second, and if the infection information is confirmed a second time, the checks will be more frequent until the threat is removed. The total number of infected sites in the Yandex database does not exceed 1%.

Every day in 2013, Yandex checks 23 million web pages (while detecting 4,300 dangerous sites) and shows users 8 million warnings.[13] Approximately one billion sites are reviewed monthly.

Search classification

For a long time, the key ranking factor for Yandex was the number of third-party links to a particular site. Each Internet page was assigned a unique citation index, similar to the author index of scientific articles: the more links, the better. A similar mechanism was implemented in Yandex and Google Pagerank. To avoid cheating, Yandex uses multivariate analysis, in which only 70 out of 800 factors are affected by the number of third-party links. Today, the content of the site and the presence or absence of keywords on it, the readability of the text, the domain name, its history and the presence of multimedia content play a much more important role.

On December 5, 2013, Yandex announced that it completely refused to account for the link factor in the future.[14]​.

Search Suggestions

As the user types the query into the search bar, the search engine offers suggestions in the form of a drop-down list. Suggestions appear even before search results appear, allowing you to refine your query, correct a layout or typo, or go directly to the site you're looking for. For each user, suggestions are generated based on the history of their search queries using the My Findings service. In 2012, the so-called "Smart Search Tips" appeared, which provide instant information about the main constants (longitude of the equator, speed of light, etc.), traffic jams and have a built-in calculator. In addition, a translator was integrated into the "Suggestions" (the query "love in French" instantly gives amour, affection), the calendar and results of football matches, exchange rates, weather forecasts and much more. You can find out the exact time by asking "what time is it." In 2011, Yandex search suggestions became completely local in 83 regions of Russia.[15]​.

In addition to the actual search, suggestions are built into Yandex search engines. Dictionaries "," Yandex Mercado") ”,“ Yandex Maps "and other Yandex services.

The hint function is a consequence of the development of intentional search technology and first appeared on Yandex.Bar in August 2007, and in October 2008 it was introduced to the main page of the search engine. Available on desktop and mobile versions of the site, Yandex shows its users more than 1 billion search suggestions per day.