[u' @incollection{sixto_analysis_2018, series = {Lecture {Notes} in {Computer} {Science}}, title = {Analysis of the {Structured} {Information} for {Subjectivity} {Detection} in {Twitter}}, isbn = {978-3-319-90286-9 978-3-319-90287-6}, url = {https://link.springer.com/chapter/10.1007/978-3-319-90287-6_9}, abstract = {In this paper, we analyze the opportunities of the structured information of the social networks for the subjectivity detection on Twitter micro texts. The sentiment analysis on Twitter has been usually performed through the automatic processing of the texts. However, the established limit of 140 characters and the particular characteristics of the texts reduce drastically the accuracy of Natural Language Processing (NLP) techniques when compared with other domains. Under these circumstances, it becomes necessary to study new data sources that allow us to extract new useful knowledge to represent and classify the texts. The structured information, also called meta-information or meta-data, provide us with alternative features of the texts that can improve the classification tasks. In this paper we analyze the features of the structured information and their usefulness in the opinion mining sub-domain, specially in the subjectivity detection task. Also present a novel classification of these features according to their origin.}, language = {en}, urldate = {2018-04-26}, booktitle = {Transactions on {Computational} {Collective} {Intelligence} {XXIX}}, publisher = {Springer, Cham}, author = {Sixto, Juan and Almeida, Aitor and L\xf3pez-de-Ipi\xf1a, Diego}, year = {2018}, doi = {10.1007/978-3-319-90287-6_9}, keywords = {Artificial Intelligence, ISI, NLP, Natural language processing, Sentiment analysis, Subjectivity detection, Text categorization, Twitter, e-rmp, ensemble, ensemble learning, machine learning, social network analysis, social networks, svn}, pages = {163--181}, } ']