Hala Skaf-Molli

Associate Professor Nantes University (holder of the scientific excellence distinction),

Member of GDD Team at Numerci Science of Nantes Laboratory LS2N

2, rue de la Houssinière, 44322 Nantes cedex 03, France

Tél. : +33 (0) 2 51 12 58 93 mailto:Hala.Skaf@univ-nantes.fr


Hala Skaf-Molli received a PhD in Computer Science from the University of Nancy, France in 1997. From 1998 to September 2010, she was an Associate Professor at the University of Nancy and member of the LORIA. Since October 2010, she is an Associate Professor at the University of Nantes and a member of the GDD Team at Lina LINA. Dr. Skaf-Molli has mainly worked on distributed semantic data management problems. She has proposed algorithmes for synchronization Distributed Semantic Wikis, RDF data and making LOD writable. She proposed also new mediator-based approaches for querying the Deep Web and Linked Data, and new algorithms for querying SPARQL federations with replicated RDF fragments. Dr. Skaf-Molli has published more than 80 research papers and has served in Program Committee of more than 20 conferences and workshops. She has participated in national projects Kolflow, SocioPlug and international projects Corvette with Hitachi Japan, and coordinate LodPaddle selected by the FP 7 European Lod 2 project.

Habilitation à Diriger de Recherche (HDR):

Recent Papers:

Distributed Semantic Wikis Papers

  • Distributed Semantic MediaWiki (DSMW)] (Released in LGPL (October 2009): DSMW is an extension of Semantic Mediawiki (SMW). It allows to create a network of SMW servers that share common semantic wiki pages. DSMW manages synchronisation of shared semantic pages and ensures CCI consistency. CCI stands for Causality, Convergence, Intentions. DSMW provides to SMW nearly the same features as a Distributed Version Control systems. It uses a semantic publish/Subscribe mechanism to propagate modifications.
    • Paper : Multi-synchronous Collaborative Semantic Wikis Charbel Rahhal, Hala Skaf-Molli, Pascal Molli and Stéphane Weiss. In Wise'09: International Conference on Web Information Systems, 2009.
    • Demo: Distributed Semantic MediaWiki Hala Skaf-Molli, Gérôme Canals and Pascal Molli. Demonstration in 7th Extended Semantic Web Conference 2010.
    • Peer-to-peer Semantic Wikis(SWOOKI)is a Peer-to-peer network of autonomous semantic wiki servers (called also peers or nodes) that can dynamically join and leave the network. Every peer hosts a copy of all semantic wiki pages and an RDF store for the semantic data. Every peer can autonomously offer all the services of a semantic wiki server. When a peer updates its local copy of data, it generates a corresponding operation. This operation is broadcasted through the P2P? network to all other peers to be integrated.
    • Paper :Peer-to-peer Semantic Wikis. Hala Skaf-Molli, Charbel Rahhal and Pascal Molli. In DEXA'09: 20th International Conference on Database and Expert Systems Applications , Linz, Austria , August 2009.
    • Paper: SWooki: Un Wiki Sémantique sur réseau Pair-a-Pair. Rahhal, Charbel, Skaf-Molli, Hala and Molli, Pascal . Ingénierie des Systèmes d'Information, 14(1), 2009
    • Demonstration :SWooki: Supporting Disconnection in a Peer-to-peer Semantic Wiki. Hala Skaf-Molli, Pascal Molli and Gérome Canals. In Demonstration at 5éme Journées Francophones : Mobilité et Ubiquité - UbiMob?? 2009

Graduate and Post Graduate Students( PhD)

Post Doc:

  • 2018-2019: Sara El Hassad funding project Sedela, Comin Labs.

Ongoing Thesis:

  • Started 2017 : Thomas Minier
  • Started 2017 : Arnaud Grall

Past Thesis

  • 2014-2017: Co-advisor of PhD thesis Pauline Folz, funding by Cifre Bourse of Nantes Métropole. Title: Collaboration dans une fédération de consommateur de données liées. Collaboration in a federation of linked data consumers. Current Situation: R&D Orange Lab Grenoble.
  • 2013-2016: Co-advisor of PhD thesis Gabriela Motoya, funding by CNRS. Title: Answering SPARQL Queries using Views. Current Situation: post-doc at the University of Aalborg, Danemark
  • 2012-2015: Co-advisor Luis Daniel Ibáñez, funding ANR Folflow. Title: Towards a Read/Write Web of Linked Data. Current Situation: Post-Doc at the university fo Southampton, England.
  • 2010-2014: Co-advisor of PhD thesis Diego Torres, co-tutelle with Alicia Diaz. Title: Co-evolution between Social and Semantic Web. Current Situation: Associate Professor, Université de la Plata, Argentina.
  • 2009-2012: Co-advisor of PhD thesis Khaled Mobayed, Title: Divergence Awareness in Distributed Multi-Synchronous Collaborative Systems. Current Situation: R&D Scientist at Criteo
  • 2007-2010: Co-director of PhD thesis ofCharbel Rahhal , Title: Wikis sémantiques sur réseaux pair-à-pair. Current Position: associate professor, Liban.

Master 2 research thesis

  • 2017: Thomas Minier et Arnaud Grall (de l'Université de Nantes) et Grégoire Bonin (de l'ENS-Rennes).
  • Master Gaétan GAUTIER (2013-2014): Federation of Semantic Wikis
  • 2009-2010: Diego Torres, Personal knowledge Management in Distributed Semantic Wiki, in collaboration with the University la Plata, Argentine.
  • 2009-2010: Nagham Haddad, Divergence Awareness in Distributed Semantic MediaWiki?
  • Master Doratti RAZAFIMAHATRATRA (2003-2004): Réparation automatique dans un environnement collaboratif Raport in French

Member of jurys thesis

  • 2017: Roland Kotto Kombi. Distributed query processing over fluctuating data streams. INSA Lyon, Université de Lyon. Examinatrice.
  • 2016: Sébastien Dufromentel. qTor : une approche communautaire pour l’évaluation de requêtes continues. INSA Lyon, Université de Lyon. Examinatrice.
  • 2016: Alexandre Garnier. Langage dédié au traitement des événements complexes et modélisation des usages pour les réseaux de capteurs. Université de Nantes. Examinatrice.
  • 2013: Igor Epimakhov. Allocation des ressources pour l’optimisation de requêtes dans les systèmes de grille de données. Université Toulouse 3 Paul Sabatier. Examinatrice.
  • 2009: Segio Fernando Mera. Logique modales et mémorielles. Université Henri Poincaré, Nancy1 et Université de Buneos Aires. Examinatrice.
  • 2009: Daniel Alejadro Gorin. Technique de raisonnement automatique pour les logiques hybrides. Université Henri Poincaré, Nancy1 et Université de Buneos Aires. Examinatrice.

Program Committee

International Conferences

  • 2018 : Co-chair of recherche track Linked Data of 'Extended Semantic Web Conference' ESWC 2018.
  • PC member of international conferences WWW 2017, 2018,
  • PC member ISWC 2017, 2018,
  • PC member ESWC 2017, ESWC 2018
  • PC member EKAW 2012, 2014 , 2016, 2018 (Knowledge Engineering and Knowledge Management)
  • PC member DEXA 2010-2018 (Database and Expert Systems)
 Globe 2011-2014 (Data Management in Grid and Peer-to-Peer Systems),  IFIP CIIA 2015 (Computer Science and its Applications), IEEE ICTTA 2008 (Information and Communication Technologies: from Theory to Applications),
IFIP CONFENIS 2007 (Research and Practical Issues on Enterprise Information Systems).

International Workshops:

  • PC member of DeSemWeb2017 the ISWC 2017 workshop on Decentralizing the Semantic Web, DeSemWeb2018.
  • PC member of QuWeDa? 2017-2018 (Querying the Web of Data) with ESWC 2017, ESWC 2018,
  • International Workshop on Open Problems and Emerging New Topics in Semantic Web Technology with ISWC 2018,
  • IEEE BDMICS 2016-2017 (Big Data Management in Cloud Systems) avec la conference DEXA,,
  • SWCS 2014-20012 (Semantic Web Collaborative Spaces) avec les conférences ISWC2014?, ESWC 2013 et WWW 2011,
  • RED 2011-2012 (Resources Discovery) with conference ESWC, SemWiki2008?-2010,
  • ACM CES 2006-2007 (Collaborative Editing Systems) with ACM CSCW,
  • ENEI 2005 (Enterprise and Networked Enterprises Interoperability) with BPM2005? conference.

Journal Reviewing

  • The World Wide Web journal, VLDB journal, the Elsevier Journal of Web Semantics

Organization Committee

  • BDA2013 : 29ème Journée de Bases de Données Avancées, 2013, Nantes, France.

Ongoing Projects

  • 2017-2019: Seleda: Self Data for Enhancing lifelong Learning Autonomy. Funding CominLabs?, \emph{ICT for Education}.
  • ANR OBrowser?. \emph{Applications décentralisées sur navigateurs}.

Finished Projects

 2013-2017 ANR SocioPlug?
  • 2011-2014 ANR Kolflow
  • 2013: LodPaddle is selected by the call PUBLINK of the european projet lod2
  • CyWiki? : vers une forge de la connaissance, projet associant les laboratoires LORIA, ATILF, LISEC et le Service Nutice. Project financé par l'appel à projets 2009 lancé par le CCOSL
  • Projet exploratoire ISCC 2009,CNRS, P2CeL? – Collaborative Knowledge Construction and E-Learning: An Approach Based on Semantic Wikis." http://www.thermoptim.org/sections/enseignement/communaute-p2cel (in french)
  • Project TALC du CPER MISN :"Vers un wiki sémantique pour la gestion des connaissances d’un système de raisonnement à partir de cas." http://wikitalc.loria.fr/dokuwiki/doku.php?id=operations:wikisem (in french)
  • Pré-opération MSH 2009
  • Project Seyct (2008-2010), with La Plata University, Argentina.
  • Responsable of Projet Rorax (2006-2008), French/Libanese program CEDRE
  • Member of ARC INRIA Recall (2005), http://recall.loria.fr. Recall is funding the development of Wooki.
  • Member of Gdr-PRC I3 (2003-2004)
  • Member of action VXP (2001-2003), CPER QSL. VXP has funded the development of SAMS.
  • Member of action Mobi5 (2004,2006), CPER QSL. Mobi5 has funded the development of So6.
  • Member of Project Corvette with Hitachi, Japon http://www.loria.fr/equipes/ecoo/corvette/. The objective is to build a Collaborative Workflow Systems.
  • Australian Research Council IREX Grant with University of New South Wales, Sydney

Scientific Collaboration

  • Maria Esther-Vidal, Professor at the University Simón Bolívar, Caracas, Venezuela. Working on SPARQL Federation.
  • Olivera Marjovic, University of Sydney, Australia. Working on Collaborative Learning.
  • Hala Naja-Jazzar, University Libanese, Liban. Working on Collaborative Editing of XML Documents.
  • Nishadi di-Silva, University of Southompthon, England. Working on Narrative-based collaborative Writing and Semantic Consistency.
  • Alicia Diaz, University of La plata, Argentina. Working on personal knowledge in P2P? semantic wikis.

Previous Master research Subject