Detailed Vertical search engine

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Vertical search is a professional search engine for a particular industry, is the subdivision and extension of the search engine, is a Web page library of a specific type of information to carry out a consolidation, directional-field extraction of the required data processing and then returned to the user in some form.

The biggest difference between vertical search engines and ordinary Web search engines is the structured information extraction of web information. That is, the Web page of unstructured data extraction into specific structured information data, such as Web search is the smallest unit, based on the Web page block analysis is the smallest unit, Vertical search is the smallest unit of structured data. Then the data are stored in the database, further processing, such as: to weight, classification, and so on, the last word, indexing and search to meet the needs of users.

In the process, the data is extracted from unstructured data into structured data, which is returned to the user in unstructured and structured way after deep processing. Vertical search Engine Application direction is many, such as Enterprise Library Search, supply and demand information search engine, shopping search, real estate search, talent search, Map search, mp3 search, image search ... Almost all kinds of information can be further refined into various types of vertical search engine.

For example, it will be easier to understand, such as shopping search engine, the overall process is as follows: Crawl the page, the information on the Web page to extract the product name, price, Introduction ... The notebook can even be further subdivided into "brand, model, CPU, memory, hard disk, display 、......" then the information for cleaning, to weight, classification, analysis and comparison, data mining, and finally through the Word segmentation index to provide user search, through the analysis of mining to provide market reports. Vertical search engines generally require the following technologies

1.Spider

2. Web page Structured Information extraction technology or meta data acquisition technology

3. Participle, index

4. Other Information processing technologies

The technical evaluation of vertical search engine should be judged from the following points

1. Comprehensive 2. Update 3. Accuracy 4. The threshold for functional vertical search is low, but the barriers to competition are high. Without the spirit of concentration and superb technology is not.

Industry portals with industry advantages but they have no technical advantages, absolutely do not imagine a few people will be able to deal with the entire vertical search technology, as a need to continuously improve the operation of the product rather than a project to grasp the degree of control of the technology is one of the important factors in the success of vertical search.