The research of full-text retrieval technology, especially Chinese full-text retrieval technology, started around 1987, and there are some commercial software. The popularity of the Internet makes full-text retrieval technology increasingly mature.
Building an internal information publishing platform, establishing a safe information publishing channel and communication channels with other websites, establishing the application of e-commerce and establishing a data-centric application platform are all inseparable from full-text retrieval.
This retrieval technology can span all data sources, support a variety of data and information formats, arrange retrieval results according to business classification rules, and also meet user-specific knowledge retrieval requests, arrange hit results in all different information queries according to relevance or classification, and provide information browsing functions in different formats.
From the source of search results, full-text search engines can be subdivided into two types. One is to have its own indexer, commonly known as "spider" or "robot" program.