Sentiment analysis is an area of study that aims to develop computational methods and tools to extract and classify the opinions and emotions expressed by people on social networks, blogs, forums, online shoppings, and others. A lot of research has been developed addressing opinions expressed in the English language. However, studies involving the Portuguese language still need to be advanced to make better use of the specificities of the language. This paper aims to survey the efforts made specifically to address sentiment analysis in the Portuguese language. It categorizes and describes state of the art works involving approaches to each of the tasks of sentiment analysis, as well as supporting language resources such as natural language processing tools, lexicons, corpora, ontologies, and datasets.

中文翻译：

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葡萄牙语情感分析调查

情绪分析是一个研究领域，旨在开发计算方法和工具来提取和分类人们在社交网络、博客、论坛、在线购物等上表达的意见和情绪。针对用英语表达的观点，已经开展了大量研究。但是，仍需要推进涉及葡萄牙语的研究，以更好地利用该语言的特殊性。本文旨在调查专门为解决葡萄牙语中的情感分析所做的努力。它对涉及情感分析每项任务的方法以及支持语言资源（如自然语言处理工具、词典、语料库、本体和数据集）的最先进作品进行了分类和描述。