Casos de Uso (Aluno do Schwabe) The criteria to select the cases were the following: 1. The case should be published as a difficult case in the area. Since the case is published, we infer that the case is a real problematic situation faced by a community of data users, with reasonable complexity. [ Não é inventado pelo pesquisador, não teria viés de construção para validar a proposta mas pode ter viés na seleção ] 2. The case is difficult to be solved with operators in the state-of-the-art tools. The rationale for this criterion is that we can use the case studies to compare the expressivity of our model against state-of-the-art tools using the same tasks. [ Permitir comparação com outras ferramentas de exploração ] 5.1.Case Study 1: Discovering Technological Trends The changes in the technological landscape that can be identified by analyzing published patents in different time periods are observed by answering four main questions: • Which industry fields have increased the level of a