Eric Charton

Automatic semantic web annotation of named entities

This paper describes a method to perform automated semantic annotation of named entities contained in large corpora. The semantic annotation is made in the context of the Semantic Web. The method is based on an algorithm that compares the set of words that appear before and after the name entity with the content of Wikipedia articles, and identifies the more relevant one by means of a similarity measure. It then uses the link that exists between the selected Wikipedia entry and the corresponding RDF description in the Linked Data project to establish a connection between the named entity and some URI in the Semantic Web. We present our system, discuss its architecture, and describe an algorithm dedicated to ontological disambiguation of named entities contained in large-scale corpora. We evaluate the algorithm, and present our results.

Using Collaborative Tagging for Text Classification: From Text Classification to Opinion Mining

Numerous initiatives have allowed users to share knowledge or opinions using collaborative platforms. In most cases, the users provide a textual description of their knowledge, following very limited or no constraints. Here, we tackle the classification of documents written in such an environment. As a use case, our study is made in the context of text mining evaluation campaign material, related to the classification of cooking recipes tagged by users from a collaborative website. This context makes some of the corpus specificities difficult to model for machine-learning-based systems and keyword or lexical-based systems. In particular, different authors might have different opinions on how to classify a given document. The systems presented hereafter were submitted to the D´Efi Fouille de Textes 2013 evaluation campaign, where they obtained the best overall results, ranking first on task 1 and second on task 2. In this paper, we explain our approach for building relevant and effective systems dealing with such a corpus.

Mutual Disambiguation for Entity Linking

The disambiguation algorithm presented in this paper is implemented in SemLinker, an entity linking system. First, named entities are linked to candidate Wikipedia pages by a generic annotation engine. Then, the algorithm re-ranks candidate links according to mutual relations between all the named entities found in the document. The evaluation is based on experiments conducted on the test corpus of the TAC-KBP 2012 entity linking task.

Improving communication using 3D animation

This paper presents a high level view of a project which aims at improving the communication between people who do not share the same language by using a 3D animation upper layer to lift the inherent limitations of written text. We will produce animation using the Collada file format, a standard based on the XML format. This project (GITAN ) has started in January 2010, and we expect to have the first results by the end of 2010. A limited set of sentences will validate the global process and help us refine the tools developed in the pipeline.

Open Data for Local Search: Challenges and Perspectives

Local search engines are specialized information retrieval systems enabling users to discover amenities and services in their neighbourhood. Developing a local search system still raises scientific questions, as well as very specific technical issues. Those issues come for example from the lack of information about local events and actors, or the specific form taken by the indexable data. Available open data can be exploited to dramatically improve the design of local search engines and their content. The purpose of this workshop is to explore new fields of investigation both in terms of algorithmic approaches as well as originality of usable data. The workshop focuses on how open data can be used to enhance the capabilities of local search engines.