Latent Semantic AnalysisThe main focus is on the relationship behind words, rather than the basis of dictionary definitions. This relationship is based on the actual usage environment of the words and serves as a basic reference.

This idea originated from psycholinguists, who believed that hundreds of languages in the world share a common mechanism, and concluded that anyone who grows up in a specific language environment can master the relevant language. Based on this idea, people have found a simple mathematical model that can input a library of documents written in any language and output mathematical expressions based on the words and phrases of that language. The relationship between words and phrases and even the meaning between any article fragments can all be based on operations between these vectors.