Call for Papers Sentiment and Subjectivity in Text Workshop at the Annual Meeting of the Association of Computational Linguistics (COLING-ACL 2006) Sydney, Australia ** Submission Deadline: April 7, 2006 ** Sentiment and subjectivity in text constitute a problem that is orthogonal to typical topic detection tasks in text classification. Despite the lack of a precise definition of sentiment or subjectivity, headway has been made in matching human judgments by automatic means. Such systems can prove useful in a variety of contexts. In many applications it is important to distinguish what an author is talking about from his or her subjective stance towards the topic. If the writing is highly subjective, as for example in an editorial text or comment, the text should be treated differently than if it were a mostly objective presentation of facts, as for example in a newswire. Information extraction, summarization, and question answering can benefit from an accurate separation of subjective content from objective content. Furthermore, the particular sentiment expressed by an author towards a topic is important for "opinion mining", i.e. the extraction of prevalent opinions about topics or items from a collection of texts. Similarly, in business intelligence it is important to automatically extract positive and negative perceptions about features of a product or service. Over the past several years, there has been an increasing number of publications focused on the detection and classification of sentiment and subjectivity in text. The purpose of this workshop is to bring together researchers to share recent work in this area. Workshop participants and contributors are expected to come from various areas of research: Information Retrieval, Question Answering, Text Categorization, Machine Learning, etc. Topics of interest include, but are not limited to: * relevance of sentiment and subjectivity detection for question answering, information retrieval, and opinion mining * detection of sentiment strength * supervised, weakly supervised and unsupervised learning techniques for sentiment and subjectivity detection * automatic and semi-automatic discovery of subjectivity and sentiment indicators * feature analysis and feature selection for sentiment and subjectivity detection: bag-of-words approaches and beyond * topic-independent subjectivity and sentiment identification * identification of the target of subjective and sentiment expressions * attribution of opinion and sentiment * sentiment/subjectivity corpora and annotation * sentiment lexica * discourse analysis and subjectivity/sentiment * applications of sentiment and subjectivity analysis, such as * text filtering * tracking public opinion over time * analysis of survey responses * automated chat systems (chatbots) and responsive characters in software games * customer relation management * summarization of reviews IMPORTANT DATES AND DEADLINES Paper submission deadline: April 7, 2006 Notification of acceptance: May 15, 2006 Camera ready copy: June 6, 2006 SUBMISSION INFORMATION The language of the workshop is English. All submissions will be reviewed anonymously. All accepted papers will be presented in oral sessions of the workshop and collected in the printed proceedings. ORGANIZERS Michael Gamon (Microsoft Research) Anthony Aue (Microsoft Research) CONTACT For questions, comments, etc. please send email to mgamon AT microsoft Dot com. Program Committee: Shlomo Argamon (Illinois Institute of Technology) Claire Cardie (Cornell University) Graeme Hirst (University of Toronto) Eduard Hovy (USC Information Sciences Institute) Aravind Joshi (University of Pennsylvania) Jussi Karlgren (Swedish Institute of Computer Science) Roy Lipski Ana-Maria Popescu (University of Washington) Dragomir Radev (University of Michigan) Maarten de Rijke (University of Amsterdam) Marc Schrvder (DFKI) Michael Strube (EML Research) Pero Subasic (Yahoo Inc.) Peter Turney (National Research Council Canada) Vzlem Uzuner (Massachusetts Institute of Technology) Casey Whitelaw (University of Sydney) Janyce Wiebe (University of Pittsburgh)