Architecture pour le filtrage dans les bases de données relationnelles (2008)
Le premier objectif de cette thèse est de mettre en valeur la notion de filtrage des données par automate fini, décentralisé près de la mémoire de masse comme moyen efficace de traiter les...
SOURCE IDENTIFICATION AND QUERY REWRITING IN OPEN XML DATA INTEGRATION SYSTEMS (2008)
Francois Boisson, Michel Scholl, Imen Sebei, Dan Vodislav, Cedric Cnam
This paper presents OpenXView, a model for open, large scale XML data integration systems, characterized by the autonomy of users that publish XML data on a common topic. Autonomy implies frequent...
STYX: Connecting the XML Web to the World of Semantics (2008)
Irini Fundulaki, Bernd Amann, Catriel Beeri, Michel Scholl, Anne-marie Vercoustre
beeri@cs.huji.ac.il 3 INRIA-Rocquencourt; currently on leave at CSIRO Mathematical and Information
Scalability of source identification in data integration systems (2008)
François Boisson, Michel Scholl, Imen Sebei, Dan Vodislav
Abstract. Given a large number of data sources, each of them being indexed by attributes from a predefined set A and given a query q over a subset Q of A with size k attributes, we are interested in...
SOURCE IDENTIFICATION AND QUERY REWRITING IN OPEN XML DATA INTEGRATION SYSTEMS ABSTRACT (2008)
Francois Boisson, Michel Scholl, Imen Sebei, Dan Vodislav, Cedric Cnam Paris
This paper presents OpenXView, a model for open, large scale XML data integration systems, characterized by the autonomy of users that publish XML data on a common topic. Autonomy implies frequent...
Martin Breunig, Can Türker, Michael H. Böhlen, Stefan Dieker, Ralf Hartmut Güting, Christian S. Jensen, ...
This chapter is devoted to architectural and implementation aspects of spatiotemporal database management systems. It starts with a general introduction into architectures and commercial approaches...
Oliver Gunther, Jean-marc Saglio, Michel Scholl, Vincent Oria
Spatial joins are join operations that involve spatial data types and operators. Spatial access methods are often used to speed up the computation of spatial joins. This paper addresses the issue of...
Benchmarking Spatial Joins (2007)
A La Carte, Oliver Gunther, Vincent Oria, Jean-marc Saglio, Michel Scholl
Spatial joins are join operations that involve spatial data types and operators. Spatial access methods are often used to speed up the computation of spatial joins. This paper addresses the issue of...
Vassilis Christophides, Marco Padula, Michel Scholl
The Aquarelle project aims at developing a distributed multimedia information system, offering access to information describing and documenting European cultural heritage such as painting,...
Application of a Graph Model to Hypertext Querying (2007)
We present a model for data organized as graphs with typed nodes and edges. Regular expressions over the types of the node and edge labels are used to select walks in the hypertext graph. An outline...
A Performance Evaluation of Spatial Join Processing Strategies (2007)
Apostolos N. Papadopoulos, Philippe Rigaux, Michel Scholl
Performing a fair comparison of the various spatial join techniques that have been proposed in the past decade is a challenging task, since they have been validated through experimental evaluation...
Benchmarking Spatial Joins (2007)
La Carte, Oliver Gunther, Vincent Oria, Jean-marc Saglio, Michel Scholl
Spatial joins are join operations that involve spatial data types and operators. Spatial access methods are often used to speed up the computation of spatial joins. This paper addresses the issue of...
International Journal on Digital Libraries manuscript No. (2007)
Bernd Amann, Irini Fundulaki, Michel Scholl
(will be inserted by the editor) Integrating ontologies and thesauri for RDF schema creation and metadata querying.
Benchmarking Spatial Joins (2007)
A La Carte, Oliver Gunther, Vincent Oria, Jean-marc Saglio, Michel Scholl
Spatial joins are join operations that involve spatial data types and operators. Spatial access methods are often used to speed up the computation of spatial joins. This paper addresses the issue of...
Gregory Karvounarakis, Aimilia Magkanaraki, Sophia Alexaki, Vassilis Christophides, Dimitris Plexousakis, Michel Scholl
Parameterized Pattern Queries (2007)
Cédric Du Mouza, Philippe Rigaux, Michel Scholl
We introduce parameterized pattern queries as a new paradigm to extend traditional pattern expressions over sequence databases. A parameterized pattern is essentially a string made of constant...
On-line Aggregation and Filtering of Pattern-Based Queries (2006)
Cédric Du Mouza, Michel Scholl
We consider an environment where a subscription system continuously evaluates pattern-based requests over unbounded sequential data. We propose an extension of the traditional pattern-matching...
Back to the curse of dimensionality with local image descriptors (2006)
Nouha Bouteldja, Valérie Gouet-brunet, Michel Scholl
In this report, we are interested in the fast retrieval, in a large collection of points in highdimensional space, of points close to a query point: we want to efficiently find the set of points...
Evaluation of strategies for multiple sphere queries with local image descriptors (2006)
Nouha Bouteldja, Valérie Gouet-brunet, Michel Scholl
local image descriptors
Reactive Learning Objects for Distributed e-Learning Environments (2005)
Duval, Patrick, Merceron, Agathe, Scholl, Michel
We present a concept of reactive learning objects that goes away from the hydraulic view of e-learning and gives to students activity a central place. First experimentations suggest that this concept...
Reactive Learning Objects for Distributed e-Learning Environments (2005)
Duval, Patrick, Merceron, Agathe, Scholl, Michel
We present a concept of reactive learning objects that goes away from the hydraulic view of e-learning and gives to students activity a central place. First experimentations suggest that this concept...
Empowering learning Objects: an experiment with the Ganesha Platform (2005)
Patrick Duval, Agathe Merceron, Michel Scholl, Laurent Wargon
Abstract We present an architecture model to empower learning objects with the ability of calling services and of recording extensive data about students ' work. This model of 'empowered...
Optimizing Taxonomic Semantic Web Queries using Labeling Schemes (2004)
Christophides, Vassilis, Karvounarakis, Grigoris, Plexousakis, Dimitris, Vouton, Vassilika, Scholl, Michel, Tourtounis, Sotiris
This paper focuses on the optimization of the navigation through voluminous subsumption hierarchies of topics employed by Portal Catalogs like Netscape Open Directory (ODP). We advocate for the use...
Optimizing taxonomic semantic web queries using labeling schemes (2004)
V. Christophides, G. Karvounarakis, D. Plexousakis, Michel Scholl, Sotirios Tourtounis
This paper focuses on the optimization of the navigation through voluminous subsumption hierarchies of topics employed by Portal Catalogs like Netscape Open Directory (ODP). We advocate for the use...
Mining for Content Re-Use and Exchange - Solutions and Problems (2004)
Agathe Merceron, Carlos Oliveira, Michel Scholl, Carsten Ullrich
this paper, we will describe how an ontology of pedagogical objects that captures the "pedagogical semantics" of a learning resource helps data mining to retrieve more precise information....
On Labeling Schemes for the Semantic Web (2003)
Christophides, Vassilis, Plexousakis, Dimitris, Scholl, Michel, Tourtounis, Sotirios
This paper focuses on the optimization of the navigation through voluminous subsumption hierarchies of topics employed by Portal Catalogs like Netscape Open Directory (ODP). We advocate for the use...
Querying the Semantic Web with RQL (2003)
G. Karvounarakis, A. Magganaraki, S. Alexaki, V. Christophides, D. Plexousakis, Michel Scholl, ...
Real-scale Semantic Web applications, suchasKnowledge Portals and E-Marketplaces, require the management of voluminous repositories of resource metadata. The Resource Description Framework (RDF)...
Building a Constraint-Based Spatial Database System: Model, Languages, and Implementation (2003)
Philippe Rigaux, Michel Scholl, Luc Segoufin, Stéphane Grumbach
This paper presents DEDALE, a spatial database system which provides an abstract and non-specialized data model and query language for representating and manipulating geometric data in arbitrary...
Thesis: Change Control on Semistructured Data (2003)
Laurent Mignet, Supervisors Serge Abiteboul, Michel Scholl, Supervisors Sophie Cluet, Marie-christine Rousset
Thesis: Aide à la recherche sur le Web.
Querying the Semantic Web with RQL (2003)
G. Karvounarakis, A. Magganaraki, S. Alexaki, V. Christophides, D. Plexousakis, Michel Scholl, ...
Real-scale Semantic Web applications, suchasKnowledge Portals and E-Marketplaces, require the management of voluminous repositories of resource metadata. The Resource Description Framework (RDF)...
RQL: A Declarative Query Language for RDF (2002)
Karvounarakis, Gregory, Alexaki, Sofia, Christophides, Vassilis, Plexousakis, Dimitris, Scholl, Michel
Real-scale Semantic Web applications, such as Knowledge Portals and E-Marketplaces, require the management of large volumes of metadata, i.e., information describing the available Web content and...
Rql: a declarative query language for rdf (2002)
Greg Karvounarakis, So Alexaki, Vassilis Christophides, Dimitris Plexousakis, Michel Scholl
Real-scale Semantic Web applications, such as Web Portals and E-Marketplaces, re-quire the management ofvoluminous metadata repositories containing descriptive infor-mation (i.e., metadata) about the...
Rql: a declarative query language for rdf (2002)
Gregory Karvounarakis, Sofia Alexaki, Vassilis Christophides, Dimitris Plexousakis, Forth Vassilika Vouton, Michel Scholl
Real-scale Semantic Web applications, such as Knowledge Portals and E-Marketplaces, require the management of large volumes of metadata, i.e., information describing the available Web content and...
Ontology-based integration of XML Web resources (2002)
Bernd Amann, Catriel Beeri, Irini Fundulaki, Michel Scholl
Abstract. This paper deals with some modeling aspects that have to be addressed in the context of the integration of heterogeneous and autonomous XML resources. We propose an integration system, but...
Querying XML Sources Using an Ontology-Based Mediator (2002)
Bernd Amann, Catriel Beeri, Irini Fundulaki, Michel Scholl
Abstract. In this paper we propose a mediator architecture for the querying and integration of Web-accessible XML data sources. Our contributions are (i) the definition of a simple but expressive...
Managing RDF Metadata for Community Webs (2000)
Sofia Alexaki, Vassilis Christophides, Gregory Karvounarakis, Dimitris Plexousakis, Karsten Tolle, Bernd Amann, ...
. The need for descriptive information, i.e., metadata, about Web resources has been recognized in several application contexts (e.g., digital libraries, portals). The Resource Description Framework...
Integrating ontologies and thesauri for rdf schema creation and metadata querying (2000)
Bernd Amann, Irini Fundulaki, Michel Scholl
In this paper we present a new approach for building metadata schemas by integrating existing ontologies and structured vocabularies (thesauri). This integration is based on the specification of...
Author Vassilis Christophides y Contributors So a Alexaki y, (2000)
Deliverable Number D, Bernd Amann, Omar Benjelloun, Olivier Corby Z, Rose Dieng Z, Irini Fundulaki, ...
Summary The World-Wide-Web was designed to support information sharing at a global level. The C-Web project, a short name for Community-Webs, intends to support speci c communities (e.g., in...
Benchmarking Spatial Joins A La Carte (1999)
Günther, Oliver, Oria, Vincent, Picouet, Philippe, Saglio, Jean-Marc, Scholl, Michel
Spatial joins are join operations that involve spatial data types and operators. Spatial access methods are often used to speed up the computation of spatial joins. This paper addresses the issue of...
Benchmarking Spatial Joins A La Carte (1999)
Günther, Oliver, Oria, Vincent, Picouet, Philippe, Saglio, Jean-Marc, Scholl, Michel
Spatial joins are join operations that involve spatial data types and operators. Spatial access methods are often used to speed up the computation of spatial joins. This paper addresses the issue of...
The Design and Implementation of DEDALE (1999)
Stéphane Grumbach, Philippe Rigaux, Michel Scholl, Luc Segoufin
This paper introduces dedale, one of the first implementations of a database system based on the linear constraint model. dedale is a long term project started in 1996 as a cooperation between the...
A performance evaluation of spatial join processing strategies (1999)
Apostolos Papadopoulos, Michel Scholl
Abstract. We provideanevaluation of query execution plans (QEP) in the case of queries with one or two spatial joins. The QEPs assume R-tree indexed relations and use a common set of spatial joins...
A performance evaluation of spatial join processing strategies (1999)
Apostolos Papadopoulos, Michel Scholl
Abstract. We provide an evaluation of query execution plans (QEP) in the case of queries with one or two spatial joins. The QEPs assume R ¥-tree indexed relations and use a common set of spatial...
Benchmarking Spatial Joins À La Carte (1998)
A La Carte, Oliver Günther, Philippe Picouet, Vincent Oria, Jean-marc Saglio, Michel Scholl
Spatial joins are join operations that involve spatial data types and operators. Spatial access methods are often used to speed up the computation of spatial joins. This paper addresses the issue of...
Benchmarking Spatial Joins À La Carte (1998)
Oliver Gunther, Vincent Oria, Jean-marc Saglio, Michel Scholl
Spatial joins are join operations that involve spatial data types and operators. Spatial access methods are often used to speed up the computation of spatial joins. This paper addresses the issue of...
Benchmarking Spatial Joins À La Carte (1997)
A La Carte, Oliver Günther, Philippe Picouet, Vincent Oria, Jean-marc Saglio, Michel Scholl
Spatial joins are join operations that involve spatial data types and operators. Spatial access methods are often used to speed up the computation of spatial joins. This paper addresses the issue of...
Querying heterogeneous data in Aquarelle project (1997)
V. Christophides, Vassilis Christophides, Marco Padula, Michel Scholl
The Aquarelle project aims at developing a distributed multimedia information system, offering access to information describing and documenting European cultural heritage such as painting,...
dedale, A Spatial Constraint Database (1997)
St'ephane Grumbach, Michel Scholl, Luc Segoufin
. This paper presents a first prototype of a constraint database for spatial information, dedale. Implemented on top of the O2 DBMS, data is stored in an object-oriented framework, with spatial data...
DEDALE, A Spatial Constraint Database (1997)
Stéphane Grumbach, Philippe Rigaux, Michel Scholl, Luc Segoufin
. This paper presents a first prototype of a constraint database for spatial information, dedale. Implemented on top of the O2 DBMS, data is stored in an object-oriented framework, with spatial data...
D4.6: Querying heterogeneous data (1997)
Vassilis Christophides Y, Paola Carrara Z, Marco Padula Z, Michel Scholl
Abstract The Aquarelle project aims at developing a distributed multimedia information system, o ering access to information describing and documenting European cultural heritage such as painting,...
SGBD Géographiques - Spécificités (1996)
Scholl, Michel, Voisard, Agnès, Peloux, Jean-Paul, Raynal, Laurent, Rigaux, Philippe
Point and window queries with linear spatial indices: An evaluation with O2 (1996)
Michel Scholl, Gilles Grangeret
Spatial query optimization: a challenge for GIS design Geographic Information Systems (GIS) utilize Database Management Systems (DBMS) for storing and retrieving geo-referenced data. Such data is...
Schema-Based Authoring and Querying of Large Hypertexts (1995)
Bernd Amann, Michel Scholl, Antoine Rizk
Modern hypertext applications require new system support for hypertext authoring and user navigation through large sets of documents connected by links. This system support must be based on advanced,...
Multi-Scale Partitions: Application to Spatial and Statistical Databases (1995)
Philippe Rigaux, Michel Scholl
. We study the impact of scale on data representation from both the modelling and querying points of view. While our starting point was geographical applications, statistical databases also address...
Multi-Scale Partitions: Application to Spatial and Statistical Databases (1995)
Philippe Rigaux And, Michel Scholl
We study the impact of scale on data representation from both the modelling and querying points of view. While our starting point was geographical applications, statistical databases also address...
Multiple Representation Modelling and Querying (1994)
Philippe Rigaux, Michel Scholl
. One challenge in spatial data modelling is related to multiple representation of geographic objects. While often associated with cartographic change of scale and generalization, it applies in fact...
Querying Typed Hypertexts in Multicard/O 2 (1994)
Bernd Amann, Michel Scholl, Cedric Cnam, Antoine Rizk
Due to the growing complexity of modern hypertext applications, current hypertext systems require new mechanisms to support authoring and user navigation through large sets of documents connected by...
A Map Editing Kernel Implementation: Application to Multiple Scale Display (1993)
Philippe Rigaux, Michel Scholl, Agnès Voisard
User interfaces represent a fundamental component of geographic information systems (GIS) and geographic database management systems (DBMS). We propose in this paper a simple architecture for...
A Map Editing Kernel Implementation: Application to Multiple Scale Display (1993)
Philippe Rigaux, Michel Scholl, Agnès Voisard
. User interfaces are a fundamental component of applications using as support Geographic Information Systems (GIS) and geographic DataBase Management Systems (DBMS). We propose in this paper a model...
Gram: A Graph Data Model and Query Language (1992)
We present a model for data organized as graphs. Regular expressions over the types of the node and edge labels are used to qualify connected subgraphs. An algebraic language based on these regular...
Object-Oriented Database Systems for Geographic Applications: an Experiment with O_2 (1992)
In this paper, we study the implementation of a spatial relational-like query language for geographic applications in an object-oriented environment. A prototype has been developed on top of the...
We study here how to provide the designer of geographic databases with a database query language extensible and customizable. The model presented here is a first step toward a high level spatial...
Architecture pour le filtrage dans les bases de données relationnelles (1985)
Le premier objectif de cette thèse est de mettre en valeur la notion de filtrage des données par automate fini, décentralisé près de la mémoire de masse comme moyen efficace de traiter les...
Architecture pour le filtrage dans les bases de données relationnelles (1985)
Le premier objectif de cette thèse est de mettre en valeur la notion de filtrage des données par automate fini, décentralisé près de la mémoire de masse comme moyen efficace de traiter les...
Architecture pour le filtrage dans les bases de données relationnelles (1985)
Le premier objectif de cette thèse est de mettre en valeur la notion de filtrage des données par automate fini, décentralisé près de la mémoire de masse comme moyen efficace de traiter les...
Packet Switching in Radio Channels: New Conflict-Free Multiple Access Schemes (1980)
Leonard Kleinrock, Michel Scholl
Abstract-We study new access schemes for a population of geographically distributed data users who communicate with each other and/or with a central station over a multiple-access broadcast ground...
Benchmarking Spatial Joins À La Carte
Günther, Oliver, Oria, Vincent, Picouet, Philippe, Saglio, Jean-Marc, Scholl, Michel
Spatial joins are join operations that involve spatial data types and operators. Spatial access methods are often used to speed up the computation of spatial joins. This paper addresses the issue of...
Benchmarking Spatial Joins À La Carte
Günther, Oliver, Oria, Vincent, Picouet, Philippe, Saglio, Jean-Marc, Scholl, Michel
Spatial joins are join operations that involve spatial data types and operators. Spatial access methods are often used to speed up the computation of spatial joins. This paper addresses the issue of...