W.13 Categorization / CAI MUBO

I personally feel that the completeness and independence of the classification are not the most important issues. The most important thing is how you use this classification. I am a typical pragmatist and do not want to study these so-called theories like a scholar. In fact, as far as the current Internet development is concerned, the full-text retrieval technology has encountered a bottleneck, and more attention has been shifted to vertical search. This is called a very brutal growth in the beginning. After occupying the market, the real test of whether you can survive is whether you can be refined in an independent field. This is very important. For example, if you want to query job information, will you first choose Baidu; or if you want to query for e-commerce information, will you first choose Baidu? These questions reflect the current trend, that is, vertical search will make people use it with more confidence. But the average user is already accustomed to input in full-text search, expecting a very professional answer. However, a great feature of search engines is that they assume the independence of query terms, search based on keywords, and even add some price factors to reorder answers. If the search engine is at the front end of the submission, it can identify the domain that the query belongs to at the beginning, and then submit it to a vertical search engine, it is not very good. Of course, as I said earlier, there is no need to accurately classify these queries into a certain category, targeting the specialty fields of a specific vertical search engine, and then doing work such as feature extraction in this field.