Postprocessing information
Once the web pages are collected from the Web, there are natural language processing algorithms that are able to extract relevant information for different commercial purposes apart from building a web search engine. We will discuss here algorithms that are able to extract the main topics on the collection of documents (latent Dirichlet analysis) and to extract the sentiment or opinion of each web page (opinion mining techniques).
Latent Dirichlet allocation
Latent Dirichlet allocation (LDA) is a natural language processing algorithm that belongs to the generative model category. The technique is based on the observations of some variables that can be explained by other underlined unobserved variables, which are the reasons ...
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