Current mainstream directory index search engine
Source: Shangpin China |
Type: website encyclopedia |
Date: September 2, 2012
Although the development of directory index search engines has declined in recent years, and the market influence is not as good as before, as one of the main forms of search engines, directory index search engines have a great impact on enterprises Website production It still has certain use value.
1. Foreign mainstream directory index search engine
(1)Yahoo( //site.yahoo.comcn/ )
As one of the earliest directory indexes in the world and the most important search service website at present, Yahoo accounts for about 36% of all Internet search applications. In addition to the main station (//www. yahoo. com), there are also U.S. metropolitan city sub stations (such as Chicago sub station), national sub stations (such as Yahoo China) and international regional sub stations (such as Yahoo Asia). In its database The registration website is of high quality both in form and content.
Yahoo is a directory index search engine. You can find information on it in two ways. One is the common key search; The second is to search level by level according to the directory index. When searching by keywords, the website arrangement is based on the directory index and the correlation between website information and keyword strings. The directory containing keywords and the matching websites under the directory rank first. When searching by directory, websites are arranged in alphabetical order. Yahoo launched its own full-text search engine in February 2004, and set the default search as web search.
It's very difficult to log in to Yahoo, and it's hard to determine the cycle. The fastest one only takes a few days, usually lasts about one month, and the longest one can be up to two months! If your website does not meet the requirements, you may never log in. Currently Yahoo. A certain fee will be charged for the listing of commercial websites, and free listing is only available for non-profit websites.
Yahoo is recognized as the most difficult search engine to log in because it selects websites manually and its evaluation criteria are very strict. However, it plays an important role in enterprise online marketing, especially for commercial websites. Because Yahoo is not only the most famous Internet brand in the world, but also the most influential enterprise database, it is the first choice for enterprise websites to log in directory index search engines.
(2)Open Directory Project ( //dmoz.org/ )
Open Directory Project (ODP) is a manual directory index search engine second only to Yahoo. And Yahoo. The difference is that the editors of the Open Directory Project are volunteers, not employees. At present, the number of volunteer editors has reached tens of thousands.
ODP is similar to Yahoo in terms of website structure and content. similar. In addition to providing independent search services, it also cooperates with many other search engines, including Google, Lycos, Direct Hit, Ask Jeeves, AOL, Netscape Search, AltaVista, Fast/AliTheWeb, etc. These engines usually use ODP to provide users with directory registration, and some even rank registration websites from ODP in a prominent position.
In the past, compared with Yahoo, the ODP login period was much shorter. It usually lasts about 2 weeks, which is related to the large number of editors. However, according to users, it is very difficult to log in to ODP at this stage, sometimes even half a year. There are many reasons for this.
According to ODP editors, the most important problem is that users log in irresponsibly. If the website is submitted to an inappropriate directory, the title and description of the website do not comply with the regulations, and the website information is full of too many keywords, the workload of editors is virtually increased, resulting in that the submitted website cannot be handled in a timely manner.
In view of the above reasons, when logging in to ODP, the enterprise website should carefully consider the submitted information and try not to impose additional burden on editors.
2. Domestic mainstream directory index search engine
(1) Sina（ //classad.sina.com.cn/ )
Sina is one of the largest Chinese language portals in the world, and Sina Beijing alone currently has 600 million visits per day. According to the research report on the behavior and attitude of Chinese Internet users jointly released by Beijing CCID Information Technology Co., Ltd. and Gallup Consulting Co., Ltd., Sina is the most frequently visited website by domestic Internet users.
Sina has built its own independent directory index. It is the largest Chinese search engine with 15 categories of directories, more than 10000 sub items and more than 200000 websites. Provide website, Chinese web page, English web page, news, pictures, MP3, tourism and other query items, and support Chinese domain names. At present, Sina's search rule is to search classified websites by default, and the scope is limited to registered websites in its own directory. When there is no corresponding record in the directory, it will automatically switch to web search. When searching the web page, call the Google search engine to query. The website ranking is determined according to the relevance of the directory and website information to the search criteria.
At present, except for websites of schools, government institutions and scientific research institutions, other types of websites have to pay a certain fee to log in to Sina search engine. After submitting the website to Sina, the staff will generally notify the results within 2 working days. Since Sina is currently the most commonly used Chinese search engine and one of the main sources of website visits, logging on Sina is also the only way for domestic enterprises to promote their websites.
(2) Sohu（ //www . sogou .com/dir/)
Sohu is a famous portal website in China, and also one of the earliest websites providing search services in China. Sohu has contributed greatly to the popularity of the Internet concept in China. Sohu ranked first in the ranking survey of search engine network specific functions held by CNAZ (Chinese Website Evaluation and Certification Network) in early 2001.
Sohu has an independent directory index and uses the self-developed "Sogou" search engine technology to provide multiple search options such as website, webpage, category, news, yellow page, Chinese website, software, etc. Sohu mainly searches Chinese websites and supports Chinese domain names. When the search rule of Sogou is website search (default), the scope is limited to the registered websites in its own directory. However, if there is no corresponding record in the directory, it will automatically switch to web search. Baidu is called to search the web page. In addition, users can also select "comprehensive" search to find matching websites and pages at the same time. The website links in the returned results are displayed in the top half of the page, while the page results from Baidu search engine are listed in the bottom half of the page.
Since September 2001, Sohu has fully implemented the charge for website login. At present, except for websites of schools, scientific research institutions, government units and other nature, it is still free to login, other websites must pay a certain fee for login. The log in period of Sohu is generally 3 working days, and the staff will notify the log in result by E-mail. Sohu is one of the most important access sources of the website, so it is the first choice for domestic search engine login.
(3) Netease（ //dir.so.163.com/index.php )
NetEase, which, together with Sohu and Sina, is known as China's three major portals, also has an independent open directory index. The maintenance of the directory is the responsibility of volunteer administrators. Similar to the foreign dmoz.com/ODP, NetEase once had tens of thousands of volunteer administrators during the free login period. At present, the voluntary administrator system has been abolished for other toll registration directories except for some public welfare industry directories. Netease web search was once supported by Baidu engine, and now it uses the self-developed "Youdao" retrieval technology. Provide website retrieval, web page retrieval, industry website retrieval, image retrieval and other query items.
At present, NetEase's search rule is the default website search, which is limited to directory registration websites. However, when there is no corresponding record in the website database, it will automatically switch to webpage search. Website search: search the matching website in the directory index. When searching the webpage, call the search engine database of China Search (China Search Alliance) to return the corresponding search results.
The login period of NetEase is generally 2 working days (paid login). Since June 2002, NetEase has launched a paid login service, but it is the same policy as Sohu and Sina, and public welfare websites can still login NetEase for free.
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