Vertical Search

Vertical search is for a certain trade professional search engine, is the search segmentation and outspread, is the sort of web library a dedicated information integration, directional points field to extract data processing later returned to the user in some form. Relatively general search engine large amount of information, inquires the inaccurate, such as depth, not brought out a new search engine service mode, through a particular field, a particular people or a particular demand provide some valuable information and related services. Its characteristic is "designed, fine and deep", and has the profession colour, compared the universal search engine of the mass information disorder, vertical search engine appears more dedicated, specific and deeper.

introduction

Vertical search engines are relatively general search engine large amount of information, inquires the inaccurate, such as depth, not brought out a new search engine service mode, through a particular field, a particular people or a particular demand provide some valuable information and related services. Its characteristic is "designed, fine and deep", and has the profession colour, compared the universal search engine of the mass information disorder, vertical search engine appears more dedicated, specific and deeper.

Vertical search engine and ordinary web search difference

Vertical search engine and ordinary web search engine for the biggest difference is the web information structured information extraction, is also to the unstructured data extracting page into specific the structural information of data, such as web search based on web pages for minimum unit, based on visual web piece on web piece for the smallest analysis unit, and vertical search is structured data for the smallest unit. Then will the data stored in database, and further processing, such as: to heavy, classification, last word segmentation, the way to search index to meet the needs of your users. The whole process, data from the unstructured data extracting into structured data processing, after depth in unstructured way and structured way returned to the user.

Microsoft research a technical experts once said: "75% of content used search engines for not out". And the birth of a vertical search engine is to a greater degree to improve search "recall" and "precision". Vertical search engine based on the information in the industry field model and user model of structured collection or another organization, provide more and more professional and personalized related services.

Application direction

Vertical search engine application direction, such as enterprise library search many supply and demand information search engines, and shopping search, housing search, talent search, maps search, mp3 search, image search... Almost all walks of life all kinds of information can be further refined into various vertical search engine. For example to inaugurals easier to understand, such as shopping search engine, roughly as follows: the overall process, for the web page to grab after commodity information extraction, extract the name of commodity, price, profile... Can even further the notebook profile subdivided into "brand, model, CPU, memory, and hard drive, display,..." Then on information for cleaning, to heavy, classification, analysis and comparison, data mining, finally through participle index provides users search, through analyzing the market report. Shews

technology

Vertical search engine generally need the following technologies

1. The search engine crawler: grab Internet website

2. Web structured information extraction technology or yuan data collection technology: from web pages abstracted from structured data

3. Participles, index: storage and index data

4. Data show: because the data stored not simple web pages, you need to consider the data according to industry needs to display

5. Other information processing technology

Technology assessment

Vertical search engine technology assessment to judge from the following points

1. Sweeping

2. Update sex

3. Accuracy

4. The functional

Vertical search the entry threshold is low, but the threshold is very high competition. No dedicated spirit and exquisite technology is no good. Industry portal have industrial advantage but they are not technical advantage, absolutely don't imagine that recruit several people can handle all the technical, vertical search as a need to continuous improvement can run products instead of a project to run's technique control degree is vertical search success is one of the important factors.