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The Probabilistic Relevance Framework (PRF) is a formal framework for document retrieval, grounded in work done in the 1970–1980s, which led to the development of one of the most successful text-retrieval algorithms, BM25. In recent years, research in the PRF has yielded new retrieval models capable of taking into account document meta-data (especially structure and link-graph information). Again, this has led to one of the most successful Web-search and corporate-search algorithms, BM25F....
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An overwhelming number of legal documents is available in digital form. However, most of the texts are usually only provided in a semi-structured form, i.e. the documents are structured only implicitly using text formatting and alignment. In this form the documents are perfectly understandable by a human, but not by a machine. This is an obstacle towards advanced intelligent legal information retrieval and knowledge systems. The reason for this lack of structured knowledge is that the...
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Présentation de CATE (Case Theory Editor) est un outil visant à produire des codes correspondant à des théories visant à expliquer la jurisiprudence.
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In this poster, we present a method for extracting queries related to real-life events, or news-related queries, from large web query logs. The method employs query frequencies and search over a collection of recent news. News-related queries can be helpful for disambiguating user information needs, as well as for effective online news processing. The performed evaluation proves that the method yields good precision.
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The potential of knowledge-based technological support for work in the legal domain has become widely recognized in recent time. This paper argues for an approach that is meant to complement existing work on top-level, statute-based ontologies for the law by extracting conceptual knowledge from verdict texts. Starting from a corpus-based survey on the definition and modification of concepts in German court verdicts we are currently working out a detailed description of the linguistic...
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Cet article présente un modèle qui met l'accent sur les décisions, les règles que l'on peut extraire de ces décisions et les valeurs sociales qui justifient ces règles.
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Queries submitted to the Excite search engine were analyzed for subject content based on the cooccurrence of terms within multiterm queries. More than 1000 of the most frequently cooccurring term pairs were categorized into one or more of 30 developed subject areas. Subject area frequencies and their cooccurrences with one another were tallied and analyzed using hierarchical cluster analysis and multidimensional scaling. The cluster analyses revealed several anticipated and a few...
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L'alliance du droit et de la science informatique n'est pas récente. Préfigurée dans les recherches logiques sur le droit, elle s'est développée avec la naissance de la cybernétique. Puis l'informatique s'est intéressée aux opérations de mémorisation de l'information juridique: les grandes banques de données sont devenues les bibliothèques quotidiennes du juriste. La dernière étape, la nôtre, est celle de l'intelligence artificielle c'est-à-dire d'une informatique qui formalise des...
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We describe in this paper a boolean Information Retrieval system that adds word semantics to the classic word based indexing. Two of the main tasks of our system, namely the indexing and retrieval components, are using a combined word-based and sense-based approach. The key to our system is a methodology for building semantic representations of open text, at word and collocation level. This new technique, called semantic indexing, shows improved effectiveness over the classic word based indexing techniques.
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L'argumentation est une activité-clé du juriste et l'argumentation formelle est un sujet de recherche essentiel dans l'Intelligence artificielle et le Droit. Des modèles d'argumentation juridique peuvent être créés de diverses manières. Une approche relativement récente consiste à utiliser l'ordinateur comme outil d'assistance, ce que l'on nomme l'argumentation juridique assistée par ordinateur (Gordon, Lodder, Loui) ou la dialectique informatique. La recherche part du constat qu'un...
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Le projet ESPRIT intitulé CLIME a été lancé en février 199 (Computerized Legal Information Management and Explanation ; P25.414)1. L'objectif de CLIME est d'améliorer l'accès aux vastes réseaux d'information juridiques qui circulent sur Internet et de mieux les comprendre. Nous allons démontrer les techniques et les solutions de ce projet en nous centrant sur un large domaine normatif, à savoir les navires. L'objet de cette présentation est de résumer les objectifs de CLIME, mais aussi de...
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