Author Archives: Fotis Kokkoras
The DidaxTo approach is fully presented in a paper accepted for publication by the Knowledge and Information Systems Journal (KAIS). Pantelis Agathangelou, Ioannis Katakis, Ioannis Koutoulakis, Fotios Kokkoras and Dimitrios Gunopulos. “Learning Patterns for Discovering Domain Oriented Opinion Words“, Knowledge and Information Systems Journal … Continue reading
DidaxTo implements an unsupervised approach for discovering patterns, that will extract a domain-specific dictionary from reviews. The approach utilizes opinion modifiers, sentiment consistency theories, polarity assignment graphs and pattern similarity metrics. More details in the DidaxTo page.
A new challenge ahead! We are going to help a start-up to build its proof of concept, sentiment analysis application. We will provide structured data scrapped from some challenging web sources. Web extraction techniques can provide the initial amounts of data … Continue reading
We were building a couple of wrappers recently for Jürgen (from Germany) and we fall upon a strange issue. The pound sterling character we had used in a regular expression (required for extracting prices in the UK currency) was not recognized as … Continue reading