Seoer need to know the search engine's indexer

A qualified seoer need to have a certain understanding of the structure of the search engine, so in the SEO can be done with a good idea, methodical, and not rigidly adhere to the fixed optimization methods and skills. The indexer to be analyzed at this time is a relatively important part of the search engine structure.

Indexer on the search engine is more important, such as: We are familiar with the Baidu news, it is "automatically selected by the machine every 5 minutes update", compared with real-time, and the amount of data is quite large. At this time, the effect of the indexer algorithm on the indexer is very prominent. As a result, it has been said that the effectiveness of a search engine depends to a large extent on the quality of the indexer (precisely thanks to the indexer's indexing algorithm).

Here we come to the system to understand the function of the indexer, the function of the indexer is to understand the searcher (I previously published a "SEO need to know what it is--the search Engine" introduction) search information, A5, and the collection of Web pages for analysis, extraction of relevant information, such as Web pages of keywords, the use of the page code, Web page URL, and so on. Then the relevant algorithm of the search engine carries on a lot of complex computation, obtains some related information, then uses these related information to establish the corresponding webpage index database.

1. Index entries

Through the previous introduction, you must understand some of the indexer knowledge, the following is necessary to understand the index entries. What is an index entry? for example, we usually say that the indexer index time, encoding, author, title and so on are all indexed.

Index entries can be divided into two categories, one being an objective index entry and the other a content index entry. Where the objective index entries are not related to the contents of the document, for example, we send a post, the author of the Post, post time, post address and so on are objective index items, and content index items are reflected in the content of the document, it is easy to understand, this is not an example. Content indexes can be divided into single index entries and multiple index entries.

2. Chinese participle

Provide Chinese participle, you will think of the world's largest Chinese search engine-Baidu, because Baidu search engine in Chinese participle has a deep technical foundation. General Search Engine Index English words or sentences, it is easier to extract, because the English word is separated by a space, and all these are established by the conventional. But for Chinese to write the sentence, it can not make a difference, must be the word segmentation, that is, we often say participle.

Chinese participle is the basis of text extraction, for the input of a Chinese, and then the Chinese word, and then the search engine to identify the meaning of the sentence effect.

The method of Chinese word segmentation can be divided into two kinds, one is mechanical matching method (Word segmentation method based on string matching), and the other is probability statistic method. One of the mechanical matching is built in the existing dictionary encyclopedia, and the words are matched to the result of word segmentation. It general participle method has: forward maximum matching method (from left to right direction), reverse maximum matching method (from right to left direction), minimum segmentation (so that the number of words cut in each sentence is the smallest) and bidirectional maximum matching method (performed from left to right, from right to left two scans). The probability statistic method is after the probability statistics, then carries on the processing and obtains the participle.

3. The inspiration to SEO

Based on the above analysis of the search engine indexer principle, we can rough judge a search engine technology maturity, such as the above mentioned Baidu 5 minutes automatically update news. If the site is a news class, you can pay attention to the real-time information release; We are in the determination of the site's core keywords and keywords according to Chinese word segmentation principle, remove redundant words, the site's core keywords feedback to the search engine, so that the search engine will give the site a good ranking.

SEO technology is not only this on the one hand can be gongwubuke, but also need to understand the overall search engine structure and working principle. Of course I will be in the back to share some of the search engine knowledge, and share their based on these principles and several years of SEO actual combat experience.

This article by Kyushu Webmaster College (http://www.9cms.com/) original, starting in A5, reproduced please indicate the source of the article, at the same time warmly welcome the vast number of friends to engage in SEO to communicate with each other and progress together. Thank you!