Search is to find information you need on the Internet. This tool is called a search engine, which has two basic principles: directory and retrieval. The directory refers to the website is classified, layer arrangement, and the classification search is to find target information through this logical relationship; retrieving the file to index, stored in the database, index search is related to the keyword matching Target information.
There are three basic search modes in the field of search: classified search, index search and bookmark search.
From the perspective of development, the search can be divided into seven ages: the first generation, classified search, representing the website is Yahoo (
Www.yahoo.com) and Blue Sail (
Www.search163.com); Second Generation, Index Search, Representative Website is Google.com and Tianwang (
Www.netra.com.cn); Section 2.5, bookmark search, representative website is Chiff.com and Aku navigation (
Www.arkoo.net); third generation, bidding search, representative website is OVERTURE.COM and Baidu (
Www.baidu.com); 3.5th generation, multi-searcher, representative website is Dogpile.com and Aku Search (
Www.16sou.com); the fourth generation, ODP, representing the website is DMOZ.ORG (Chinese is temporarily); the fifth generation is still technical fantasy.
Another: Nonlinear search engine
Kartoo
Www.kartoo.com
Mooter
Www.mooter.com
Automatic classification technology
Www.vivisimo.com
Classification Search and Engine Searches have a fatal weakness, a dead point, a Aquaris, and the more mature products, the more obvious this weakness. It is this weak point that determines the rationality and inevitability of the bookmark search survival.
Classification Search and Engine Searches are pursuing the complete and complete information database. They all tried to use reasonable structural or advanced algorithms, the most quickly provide the search for the information they need, but no matter how it can't be lost, Xiao He defeated the database burden. You want to find a game site to see, very good, classified search will make you a choice once again in the rating of a red classification, go to the destination, will recommend hundreds of tight other similar websites to you; engine search It will recommend 89.5 million pages related to game-related pages in the time of 0.001 seconds, of course, it will raise the order in size as it thinks.
You actually just want to find a game portal like 17173 or a chess game like the Lianzhong.
Bookmark Search is to solve this search problem. Its theory is based on, 80% of network users 80% of the 20% website, bookmark search is to make it easy to find the 20% website. If you click on the game on the bookmark search website, those on all aspects of the game are there.
At present, the website that provides bookmarking services has a new wave (
Http://dir.sina.com.cn/jinpin/index.htm, Baidu (
http://site.baidu.com) and Aku (
Www.arkoo.com).
The main content of the bookmark search has a famous website navigation, the practical website navigation, classification website navigation, and the practical information query. And professional bookmarks search website, such as Aku (
Www.arkoo.com, often integrate news broadcast, joint post office, multi-search, hot focus, reader abstracts, history today, and network users of network users such as various listings.
The famous website includes the 20 left and right sites that generally networked familiarity, and the practical website is arranged in the common websites of 16 basic network activities such as chat, forum, shopping.
The classification of bookmarks is larger than the classification of directory searches. Although the classification of bookmark search is inseparable from the principle of separation, it is more accustomed to the habit and preference of the Internet. Bookmark Search generally divide the entire information into a 72ty class, not the code of the directory search to the eighteen, enter the secondary page, and enter the three-level page to find the information you need. Practical information is the stock price, weather, exchange rate, degree balance, personal income tax calculation and even women's safety period.
