How to build a site map to provide to search engines

A search engine refers to a Web site that searches for classes. Understanding the working principles of search engines will help us with our daily search applications and website submissions.

Full-Text search engine

In the Search engine classification section We mentioned the full text search engine from the site to extract information to build a Web database concept. Search engine's automatic http://www.aliyun.com/zixun/aggregation/13241.html "> information collection function is divided into two kinds." One is a regular search, that is, every once in a while (such as Google is usually 28 days), search engine actively sent "spider" Program, a certain IP address range of Internet stations to retrieve, once found a new site, it will automatically extract the site's information and Web site to join their own database.

The other is to submit web search, that is, the site owner actively to the search engine to submit the Web site, it in a certain period of time (2 days to several months) directed to your site sent "spider" Program, scan your site and the relevant information into the database, in case the user inquiries. As a result of the search engine indexing rules have changed a lot in recent years, unsolicited Web site does not guarantee your website access to the search engine database, so the best way is to get some external links, so that search engines have more opportunities to find you and automatically your site included.

When a user searches for information with a keyword, search engine will be in the database search, if found with the user requirements of the content of the site, then use a special algorithm-usually according to the page of the keyword matching degree, the position/frequency, link quality, etc.-to calculate the relevance of each page and ranking level, The links are then returned to the user in order, depending on the degree of relevance.

Directory index

There are many differences in catalog indexing compared to Full-text search engines.

First, search engines belong to automatic Web site retrieval, while directory indexing relies entirely on manual operations. After the user submits the site, the directory editor will personally visit your site and then decide whether to accept your site based on a set of criteria and even the editors ' subjective impressions.

Second, the search engine included the site, as long as the site itself does not violate the relevant rules, the general can log in successfully. Directory indexing is a much higher requirement for web sites, and sometimes it may not be successful even if you log on multiple times. Especially Yahoo! such as Super Index, login is more difficult. (Due to login Yahoo! is the most difficult, and it is business Network marketing battleground, so we will use a dedicated space in the back of the Yahoo Yahoo skills to introduce)

In addition, when you log on to a search engine, we generally do not have to consider the classification of the site, and the login directory index must be placed in the most appropriate directory (directory).

Finally, the search engine information about each site is automatically extracted from the user's web page, so the user's point of view, we have more autonomy, while the directory index requires the need to manually fill out the site information, but also a variety of restrictions. What's more, if the staff think you submitted the site's directory, website information is not appropriate, he can adjust it at any time, of course, will not discuss with you beforehand.

Directory index, as the name implies is to store the site in the corresponding directory, so the user in the query information, can choose keyword Search, can also be sorted by category directory. such as keyword search, return the results of the same as the search engine, but also according to the degree of information related to arrange the site, but there are more human factors. If you are looking at a hierarchical directory, the ranking of the sites in a directory is determined by the order of the titles (with exceptions).

At present, search engine and catalog index have the tendency of merging and infiltration. Originally some pure full-text search engines now also provide directory search, such as Google to borrow the Open Directory directory to provide classification queries. And the old directory index like Yahoo! The search scope by partnering with Google search engines (note). In the default search mode, some directory-type search engines first return to their own directory matching sites, such as domestic Sohu, Sina, NetEase, etc., while others are the default Web search, such as Yahoo.