Extração de Informações (IE) is a subfield of Processamento de Linguagem Natural (PLN) that focuses on automatically extracting structured information from unstructured or semi-structured text data. The goal of IE is to convert free-text documents into a format that is easier to analyze and utilize, typically by identifying specific entities, relationships, and attributes.
Os sistemas de EI empregam várias técnicas para processar o texto, incluindo Reconhecimento de Entidades Nomeadas (NER), which identifies and classifies key elements such as names of people, organizations, locations, dates, and numerical values. Another important aspect is extração de relações, which determines how these entities are related to one another. For instance, in the sentence “Apple Inc. acquired Beats Electronics,” an IE system would extract “Apple Inc.” as an organization and “Beats Electronics” as another organization, while also identifying the action of “acquired” as the relationship between the two.
A EI pode ser aplicada em diversos contextos, incluindo inteligência de negócios, where companies extract insights from reports and articles; healthcare, where patient records and research papers can be analyzed for relevant information; and redes sociais, where sentiment and trends can be gauged from user-generated content.
Nos últimos anos, avanços em aprendizado de máquina and aprendizado profundo have significantly improved the accuracy and efficiency of information extraction systems, enabling them to handle larger datasets and more complex queries. As organizations increasingly rely on data-driven insights, the importance of Information Extraction continues to grow.