In this paper, a solution for querying Web databases using keywords only.

• A Bayesian network model is used to generate a set of one or more plausible structured queries derived form the initial user input.
• These queries can then be submitted to Web databases and the retrieved results presented as a set of ranked answers.
• To structure the user queries, full access to the database is not required. Instead, only a small portion of its content, extracted through a public Web interface, is used by the network model.
• This approach not only reduces the complexity of existing on-line interfaces, but also offers a solution to the problem of querying several distinct Web databases with a single interface.

via - Department of Computer Science, Federal University - Brazil.