您知道Google一共參考了多少個排名的原則麽
？在google的網站裏麵
，Google自己承認超過100個
，但是實際上呢
？告訴各位絕對不是隻有100個
，舉個例子
，時間因素沒有提
，鏡像因素沒有提
，重複問題沒有提
，網頁結構沒有提
，中文的處理>式更不可能提了（其實google對中文的處理還是很幼稚的）......
，其實Google絕對不會把他們的家底透漏出來
，否則Google就不用混了
。
各位可以在Google的網站裏麵找到以下他們承認的一些因素
。
End User Features
• Google quality and ranking
For each query,Google factors in 100 variables, including anchor text, URL patterns, fonts and positioning data to calculate relevance.
• Dynamic page summaries
Search result summaries contain dynamically generated snippets of text that show how your query was used on the page.
• Results grouping
Multiple results from the same subdirectory are grouped together, making search results easier to read quickly.
• Automatic spellchecker
Google's self-learning spellchecker automatically detects misspellings and suggests corrections. Using technology developed by Google, it is far more accurate than industry standard software.
• Cached pages
Caches copies of every page in your index, so search results can be viewed when the original sites are down.
• Hit highlighting
Query terms are highlighted on cached pages, allowing users to quickly find which parts of a page are relevant to their queries.
• View as HTML
Non-HTML search results are automatically reformatted as HTML, enabling users a quick glimpse at the content without having to launch the original application in which the content was created.
• Sort by date
Enables users to get at time-sensitive information first. Dates can be identified in any international format.
• Advanced boolean search
Offers more than 10 special query terms for advanced search functionality and supports Boolean AND, OR, and NOT searches.
Administrator Features
• Web-based Admin Console
The admin console supports multiple logins and administrative roles for crawling, serving, and monitoring with an intuitive, easy-to-use interface.
• Subcollections
Categorize searches according to URL patterns.
• Synonyms
Define synonyms for company-specific acronyms or terminology and have those terms be displayed as suggested alternative queries.
• Keymatch
Define matches between URLs and keywords so that the targeted URL displays above the main set of search results.
• Look and Feel
Search results customizable using XSLT stylesheets.
• Reporting
Web-based reports show daily and hourly result sets, top queries, special feature usage, and more. Easily export the reports for use in other reporting tools.
• URL Tracking
Analyzes all crawled content and hosts, making it easy for administrators to identify problematic servers, errors, and sources of content.
• Remote Diagnostics
Comes equipped with a modem connection for remote maintenance by Google support if necessary.
Enterprise Integration
• Web Servers
The Google Search Appliance maps all the web documents on your network accessible via hypertext transfer protocol (HTTP) in a process known as crawling, then creates an index of those documents.
• Secure Search
The Google Search Appliance has the capability to crawl password-protected areas and HTTPs content. Secure information protected by basic authentication or NTLM is shown only to users who have access authorization.
• Proxy Servers
Crawls content located behind proxy servers.
• Lotus Domino
Fast, efficient crawling of Lotus Domino servers.
• Meta Tags
Supports standard meta tag fields, enabling search narrowing and filtering based on meta tag values. Also can return meta tag data for display in search results.
• File Types
Search more than 200 file types, including HTML, Microsoft Office™, PDF, PostScript, WordPerfect, Lotus, and many others.
• Languages
Able to restrict searches to any one of 28 languages.
實際上
，幾乎每個月Google都在改變算法
，如果沒有堅持每個月u深入了解
，不出三個月就被Google剔出搜索引擎專家的行列了
，這也是為什麽國內沒有幾個人願意深入研究的原因了
。
