Umberto Straccia

Orcid: 0000-0001-5998-6757

Affiliations:
  • National Research Council, Italy


According to our database1, Umberto Straccia authored at least 169 papers between 1991 and 2024.

Collaborative distances:
  • Dijkstra number2 of four.
  • Erdős number3 of four.

Timeline

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Bibliography

2024
PN-OWL: A two-stage algorithm to learn fuzzy concept inclusions from OWL 2 ontologies.
Fuzzy Sets Syst., 2024

Belief Change based on Knowledge Measures.
CoRR, 2024

A Fuzzy Logic-Based Approach to Semantic Query Answering with Missing Values.
Proceedings of the IEEE International Conference on Fuzzy Systems, 2024

2023
Defeasible RDFS via rational closure.
Inf. Sci., 2023

PN-OWL: A Two Stage Algorithm to Learn Fuzzy Concept Inclusions from OWL Ontologies.
CoRR, 2023

Revising Typical Beliefs: One Revision to Rule Them All.
Proceedings of the 20th International Conference on Principles of Knowledge Representation and Reasoning, 2023

2022
Fuzzy OWL-Boost: Learning fuzzy concept inclusions via real-valued boosting.
Fuzzy Sets Syst., 2022

Defeasible Reasoning in RDFS.
Proceedings of the 20th International Workshop on Non-Monotonic Reasoning, 2022

A Minimal Deductive System for RDFS with Negative Statements.
Proceedings of the 19th International Conference on Principles of Knowledge Representation and Reasoning, 2022

A General Framework for Modelling Conditional Reasoning - Preliminary Report.
Proceedings of the 19th International Conference on Principles of Knowledge Representation and Reasoning, 2022

2021
A Rational Entailment for Expressive Description Logics via Description Logic Programs.
Proceedings of the Artificial Intelligence Research - Second Southern African Conference, 2021

2020
Fudge: Fuzzy ontology building with consensuated fuzzy datatypes.
Fuzzy Sets Syst., 2020

The Serializable and Incremental Semantic Reasoner fuzzyDL.
Proceedings of the 29th IEEE International Conference on Fuzzy Systems, 2020

How Much Knowledge Is in a Knowledge Base? Introducing Knowledge Measures (Preliminary Report).
Proceedings of the ECAI 2020 - 24th European Conference on Artificial Intelligence, 29 August-8 September 2020, Santiago de Compostela, Spain, August 29 - September 8, 2020, 2020

2019
A fuzzy ontology-based approach for tool-supported decision making in architectural design.
Knowl. Inf. Syst., 2019

A polynomial Time Subsumption Algorithm for Nominal Safe ELO⊥ under Rational Closure.
Inf. Sci., 2019

Towards a Forensic Event Ontology to Assist Video Surveillance-based Vandalism Detection.
Proceedings of the 34th Italian Conference on Computational Logic, 2019

2018
Multimedia Information Retrieval Model.
Proceedings of the Encyclopedia of Database Systems, Second Edition, 2018

Reasoning within Fuzzy OWL 2 EL revisited.
Fuzzy Sets Syst., 2018

An Introduction to Fuzzy & Annotated Semantic Web Languages.
CoRR, 2018

A Polynomial Time Subsumption Algorithm for Nominal Safe ELO<sub>⊥</sub> under Rational Closure.
CoRR, 2018

Datil: Learning Fuzzy Ontology Datatypes.
Proceedings of the Information Processing and Management of Uncertainty in Knowledge-Based Systems. Theory and Foundations, 2018

2017
Generalizing type-2 fuzzy ontologies and type-2 fuzzy description logics.
Int. J. Approx. Reason., 2017

Integration of deep web sources: a distributed information retrieval approach.
Proceedings of the 7th International Conference on Web Intelligence, Mining and Semantics, 2017

Fuzzy Semantic Web Languages and Beyond.
Proceedings of the Advances in Artificial Intelligence: From Theory to Practice, 2017

Couch potato or gym addict? Semantic lifestyle profiling with wearables and knowledge graphs.
Proceedings of the 6th Workshop on Automated Knowledge Base Construction, 2017

2016
The fuzzy ontology reasoner fuzzyDL.
Knowl. Based Syst., 2016

Optimising fuzzy description logic reasoners with general concept inclusion absorption.
Fuzzy Sets Syst., 2016

From Fuzzy to Annotated Semantic Web Languages.
Proceedings of the Reasoning Web: Logical Foundation of Knowledge Graph Construction and Query Answering, 2016

2015
Learning in Description Logics with Fuzzy Concrete Domains.
Fundam. Informaticae, 2015

Reducing the Size of the Optimization Problems in Fuzzy Ontology Reasoning.
Proceedings of the 11th International Workshop on Uncertainty Reasoning for the Semantic Web (URSW 2015) co-located with the 14th International Semantic Web Conference (ISWC 2015), 2015

Fuzzy Description Logics for Component Selection in Software Design.
Proceedings of the Software Engineering and Formal Methods, 2015

A Framework for Conjunctive Query Answering over Distributed Deep Web Information Resources.
Proceedings of the 23rd Italian Symposium on Advanced Database Systems, 2015

pFOIL-DL: learning (fuzzy) EL concept descriptions from crisp OWL data using a probabilistic ensemble estimation.
Proceedings of the 30th Annual ACM Symposium on Applied Computing, 2015

All About Fuzzy Description Logics and Applications.
Proceedings of the Reasoning Web. Web Logic Rules - 11th International Summer School 2015, Berlin, Germany, July 31, 2015

On partitioning-based optimisations in expressive fuzzy Description Logics.
Proceedings of the 2015 IEEE International Conference on Fuzzy Systems, 2015

2014
Complexity Sources in Fuzzy Description Logic.
Proceedings of the Informal Proceedings of the 27th International Workshop on Description Logics, 2014

A MILP-based Decision Procedure for the (Fuzzy) Description Logic ALCB.
Proceedings of the Informal Proceedings of the 27th International Workshop on Description Logics, 2014

2013
On the Top-k Retrieval Problem for Ontology-Based Access to Databases.
Proceedings of the Flexible Approaches in Data, Information and Knowledge Management, 2013

Defeasible Inheritance-Based Description Logics.
J. Artif. Intell. Res., 2013

On the (un)decidability of fuzzy description logics under Łukasiewicz t-norm.
Inf. Sci., 2013

A Logic-based Computational Method for the Automated Induction of Fuzzy Ontology Axioms.
Fundam. Informaticae, 2013

Aggregation operators for fuzzy ontologies.
Appl. Soft Comput., 2013

Finite Fuzzy Description Logics and Crisp Representations.
Proceedings of the Uncertainty Reasoning for the Semantic Web II, 2013

Towards Rational Closure for Fuzzy Logic: The Case of Propositional Gödel Logic.
Proceedings of the Logic for Programming, Artificial Intelligence, and Reasoning, 2013

A FOIL-Like Method for Learning under Incompleteness and Vagueness.
Proceedings of the Inductive Logic Programming - 23rd International Conference, 2013

On Top-k Retrieval for a Family of Non-monotonic Ranking Functions.
Proceedings of the Flexible Query Answering Systems - 10th International Conference, 2013

A System for Learning GCI Axioms in Fuzzy Description Logics.
Proceedings of the Informal Proceedings of the 26th International Workshop on Description Logics, Ulm, Germany, July 23, 2013

General Concept Inclusion Absorptions for Fuzzy Description logics: A First Step.
Proceedings of the Informal Proceedings of the 26th International Workshop on Description Logics, Ulm, Germany, July 23, 2013

Dealing with Incompleteness and Vagueness in Inductive Logic Programming.
Proceedings of the 28th Italian Conference on Computational Logic, 2013

2012
A general framework for representing, reasoning and querying with annotated Semantic Web data.
J. Web Semant., 2012

Top-k retrieval for ontology mediated access to relational databases.
Inf. Sci., 2012

Generalized fuzzy rough description logics.
Inf. Sci., 2012

Joining Gödel and Zadeh Fuzzy Logics in Fuzzy Description Logics.
Int. J. Uncertain. Fuzziness Knowl. Based Syst., 2012

A top-k query answering procedure for fuzzy logic programming.
Fuzzy Sets Syst., 2012

Foundations of Fuzzy Logic and Semantic Web Languages.
Proceedings of the 9th Italian Convention on Computational Logic, 2012

2011
Reasoning with the finitely many-valued Lukasiewicz fuzzy Description Logic SROIQ.
Inf. Sci., 2011

Fuzzy ontology representation using OWL 2.
Int. J. Approx. Reason., 2011

On the failure of the finite model property in some Fuzzy Description Logics.
Fuzzy Sets Syst., 2011

On the Undecidability of Fuzzy Description Logics with GCIs with Lukasiewicz t-norm
CoRR, 2011

Proceedings of the Doctoral Consortium and Poster Session of the 5th International Symposium on Rules (RuleML 2011@IJCAI)
CoRR, 2011

Towards Learning Fuzzy DL Inclusion Axioms.
Proceedings of the Fuzzy Logic and Applications - 9th International Workshop, 2011

Fuzzy Logic, Annotation Domains and Semantic Web Languages.
Proceedings of the Scalable Uncertainty Management - 5th International Conference, 2011

Fuzzy ontologies and fuzzy integrals.
Proceedings of the 11th International Conference on Intelligent Systems Design and Applications, 2011

Can ILP Deal with Incomplete and Vague Structured Knowledge?
Proceedings of the Latest Advances in Inductive Logic Programming, 2011

Aggregation operators and Fuzzy OWL 2.
Proceedings of the FUZZ-IEEE 2011, 2011

An Inductive Logic Programming Approach to Learning Inclusion Axioms in Fuzzy Description Logics.
Proceedings of the 26th Italian Conference on Computational Logic, Pescara, Italy, August 31, 2011

2010
Monotonic Mappings Invariant Linearisation of Finite Posets
CoRR, 2010

SoftFacts: A top-k retrieval engine for ontology mediated access to relational databases.
Proceedings of the IEEE International Conference on Systems, 2010

AnQL: SPARQLing Up Annotated RDFS.
Proceedings of the Semantic Web - ISWC 2010 - 9th International Semantic Web Conference, 2010

Finite Fuzzy Description Logics: A Crisp Representation for Finite Fuzzy ALCH.
Proceedings of the 6th International Workshop on Uncertainty Reasoning for the Semantic Web (URSW 2010), 2010

On Finding Query Rewritings under Expressive Constraints.
Proceedings of the Eighteenth Italian Symposium on Advanced Database Systems, 2010

Rational Closure for Defeasible Description Logics.
Proceedings of the Logics in Artificial Intelligence - 12th European Conference, 2010

An Ontology Mediated Multimedia Information Retrieval System.
Proceedings of the 40th IEEE International Symposium on Multiple-Valued Logic, 2010

Representing fuzzy ontologies in OWL 2.
Proceedings of the FUZZ-IEEE 2010, 2010

Combining Fuzzy Logic and Semantic Web to Enable Situation-Awareness in Service Recommendation.
Proceedings of the Database and Expert Systems Applications, 21st International Conference, 2010

A General Framework for Representing and Reasoning with Annotated Semantic Web Data.
Proceedings of the Twenty-Fourth AAAI Conference on Artificial Intelligence, 2010

2009
Multimedia Information Retrieval Model.
Proceedings of the Encyclopedia of Database Systems, 2009

On Fixed-Points of Multivalued Functions on Complete Lattices and Their Application to Generalized Logic Programs.
SIAM J. Comput., 2009

Description logic programs under probabilistic uncertainty and fuzzy vagueness.
Int. J. Approx. Reason., 2009

Fuzzy description logics under Gödel semantics.
Int. J. Approx. Reason., 2009

Fuzzy matchmaking in e-marketplaces of peer entities using Datalog.
Fuzzy Sets Syst., 2009

Fuzzy description logics with general t-norms and datatypes.
Fuzzy Sets Syst., 2009

Approximate well-founded semantics, query answering and generalized normal logic programs over lattices.
Ann. Math. Artif. Intell., 2009

Top-k Retrieval for Automated Human Resource Management.
Proceedings of the Seventeenth Italian Symposium on Advanced Database Systems, 2009

A Minimal Deductive System for General Fuzzy RDF.
Proceedings of the Web Reasoning and Rule Systems, Third International Conference, 2009

Multi Criteria Decision Making in Fuzzy Description Logics: A First Step.
Proceedings of the Knowledge-Based and Intelligent Information and Engineering Systems, 2009

Semantic-Based Top-k Retrieval for Competence Management.
Proceedings of the Foundations of Intelligent Systems, 18th International Symposium, 2009

An OWL Ontology for Fuzzy OWL 2.
Proceedings of the Foundations of Intelligent Systems, 18th International Symposium, 2009

Extending Datatype Restrictions in Fuzzy Description Logics.
Proceedings of the Ninth International Conference on Intelligent Systems Design and Applications, 2009

Towards spatial reasoning in fuzzy description logics.
Proceedings of the FUZZ-IEEE 2009, 2009

Fuzzy Descriptions Logics with Fuzzy Truth Values.
Proceedings of the Joint 2009 International Fuzzy Systems Association World Congress and 2009 European Society of Fuzzy Logic and Technology Conference, 2009

Supporting Fuzzy Rough Sets in Fuzzy Description Logics.
Proceedings of the Symbolic and Quantitative Approaches to Reasoning with Uncertainty, 2009

A System for Retrieving Top-k Candidates to Job Positions.
Proceedings of the 22nd International Workshop on Description Logics (DL 2009), 2009

Informative Top-k Retrieval for Advanced Skill Management.
Proceedings of the Semantic Web Information Management - A Model-Based Perspective, 2009

2008
Managing uncertainty and vagueness in description logics for the Semantic Web.
J. Web Semant., 2008

Tightly Coupled Fuzzy Description Logic Programs under the Answer Set Semantics for the Semantic Web.
Int. J. Semantic Web Inf. Syst., 2008

Representing Uncertainty in RuleML.
Fundam. Informaticae, 2008

DL-Media: An Ontology Mediated Multimedia Information Retrieval System.
Proceedings of the Fourth International Workshop on Uncertainty Reasoning for the Semantic Web, 2008

A Fuzzy Description Logic Approach to Bilateral Matchmaking in Electronic Marketplaces.
Proceedings of the Sixteenth Italian Symposium on Advanced Database Systems, 2008

Managing Uncertainty and Vagueness in Description Logics, Logic Programs and Description Logic Programs.
Proceedings of the Reasoning Web, 2008

Fuzzy Bilateral Matchmaking in e-Marketplaces.
Proceedings of the Knowledge-Based Intelligent Information and Engineering Systems, 2008

Towards a Crisp Representation of Fuzzy Description Logics under Lukasiewicz Semantics.
Proceedings of the Foundations of Intelligent Systems, 17th International Symposium, 2008

fuzzyDL: An expressive fuzzy description logic reasoner.
Proceedings of the FUZZ-IEEE 2008, 2008

Towards a Fuzzy Logic for Automated Multi-issue Negotiation.
Proceedings of the Foundations of Information and Knowledge Systems, 2008

Fuzzy Description Logics for Bilateral Matchmaking in e-Marketplaces.
Proceedings of the 21st International Workshop on Description Logics (DL2008), 2008

2007
Recommenders in a personalized, collaborative digital library environment.
J. Intell. Inf. Syst., 2007

Information retrieval and machine learning for probabilistic schema matching.
Inf. Process. Manag., 2007

Top-k Retrieval in Description Logic Programs Under Vagueness for the Semantic Web.
Proceedings of the Scalable Uncertainty Management, First International Conference, 2007

Extending Datalog for Matchmaking in P2P E-Marketplaces.
Proceedings of the Fifteenth Italian Symposium on Advanced Database Systems, 2007

Tightly Integrated Fuzzy Description Logic Programs Under the Answer Set Semantics for the Semantic Web.
Proceedings of the Web Reasoning and Rule Systems, First International Conference, 2007

Towards Vague Query Answering in Logic Programming for Logic-Based Information Retrieval.
Proceedings of the Foundations of Fuzzy Logic and Soft Computing, 2007

A Fuzzy Description Logic with Product T-norm.
Proceedings of the FUZZ-IEEE 2007, 2007

Mixed Integer Programming, General Concept Inclusions and Fuzzy Description Logics.
Proceedings of the New Dimensions in Fuzzy Logic and Related Technologies. Proceedings of the 5th EUSFLAT Conference, 2007

Vague Knowledge Bases for Matchmaking in P2P E-Marketplaces.
Proceedings of the Semantic Web: Research and Applications, 2007

A Top-Down Query Answering Procedure for Normal Logic Programs Under the Any-World Assumption.
Proceedings of the Symbolic and Quantitative Approaches to Reasoning with Uncertainty, 2007

DLMedia: an Ontology Mediated Multimedia Information Retrieval System.
Proceedings of the 2007 International Workshop on Description Logics (DL2007), 2007

2006
Epistemic foundation of stable model semantics.
Theory Pract. Log. Program., 2006

Description Logics over Lattices.
Int. J. Uncertain. Fuzziness Knowl. Based Syst., 2006

Towards Top-k Query Answering in Deductive Databases.
Proceedings of the IEEE International Conference on Systems, 2006

Automatic structured query transformation over distributed digital libraries.
Proceedings of the 2006 ACM Symposium on Applied Computing (SAC), 2006

An Approach to Representing Uncertainty Rules in RuleML.
Proceedings of the Rules and Rule Markup Languages for the Semantic Web, 2006

Query Answering under the Any-World Assumption for Normal Logic Programs.
Proceedings of the Proceedings, 2006

Towards Top-k Query Answering in Description Logics: The Case of DL-Lite.
Proceedings of the Logics in Artificial Intelligence, 10th European Conference, 2006

Towards Distributed Information Retrieval in the Semantic Web: Query Reformulation Using the oMAP Framework.
Proceedings of the Semantic Web: Research and Applications, 2006

General Concept Inclusions inFluzzy Description Logics.
Proceedings of the ECAI 2006, 17th European Conference on Artificial Intelligence, August 29, 2006

Uncertainty and description logic programs over lattices.
Proceedings of the Fuzzy Logic and the Semantic Web, 2006

A fuzzy description logic for the semantic web.
Proceedings of the Fuzzy Logic and the Semantic Web, 2006

2005
Any-world assumptions in logic programming.
Theor. Comput. Sci., 2005

A personalized collaborative Digital Library environment: a model and an application.
Inf. Process. Manag., 2005

User recommendation for collaborative and personalised digital archives.
Int. J. Web Based Communities, 2005

oMAP: Combining Classifiers for Aligning Automatically OWL Ontologies.
Proceedings of the Web Information Systems Engineering, 2005

Description Logics with Fuzzy Concrete Domains.
Proceedings of the UAI '05, 2005

oMAP: An Implemented Framework for Automatically Aligning OWL Ontologies.
Proceedings of the SWAP 2005, 2005

Uncertainty Management in Logic Programming: Simple and Effective Top-Down Query Answering.
Proceedings of the Knowledge-Based Intelligent Information and Engineering Systems, 2005

oMAP: Results of the Ontology Alignment Contest.
Proceedings of the Integrating Ontologies '05, 2005

Towards a Fuzzy Description Logic for the Semantic Web (Preliminary Report).
Proceedings of the Semantic Web: Research and Applications, 2005

Query Answering in Normal Logic Programs Under Uncertainty.
Proceedings of the Symbolic and Quantitative Approaches to Reasoning with Uncertainty, 2005

sPLMap: A Probabilistic Approach to Schema Matching.
Proceedings of the Advances in Information Retrieval, 2005

2004
An open collaborative virtual archive environment.
Int. J. Digit. Libr., 2004

Epistemic Foundation of the Well-Founded Semantics over Bilattices.
Proceedings of the Mathematical Foundations of Computer Science 2004, 2004

Transforming Fuzzy Description Logics into Classical Description Logics.
Proceedings of the Logics in Artificial Intelligence, 9th European Conference, 2004

2003
The Personalized, Collaborative Digital Library Environment CYCLADES and Its Collections Management.
Proceedings of the Distributed Multimedia Information Retrieval, 2003

Web Metasearch: Rank vs. Score Based Rank Aggregation Methods.
Proceedings of the 2003 ACM Symposium on Applied Computing (SAC), 2003

The Approximate Well-Founded Semantics for Logic Programs with Uncertainty.
Proceedings of the Mathematical Foundations of Computer Science 2003, 2003

Default Knowledge in Logic Programs with Uncertainty.
Proceedings of the Logic Programming, 19th International Conference, 2003

Distributed Search in the Semantic Web.
Proceedings of the 2003 International Workshop on Description Logics (DL2003), 2003

2002
Uncertainty and Partial Non-uniform Assumptions in Parametric Deductive Databases.
Proceedings of the Logics in Artificial Intelligence, European Conference, 2002

Non-uniform Hypothesis in Deductive Databases with Uncertainty.
Proceedings of the Logic Programming, 18th International Conference, 2002

A Personalized Collaborative Digital Library Environment.
Proceedings of the Digital Libraries: People, 2002

The Well-Founded Semantics in Normal Logic Programs with Uncertainty.
Proceedings of the Functional and Logic Programming, 6th International Symposium, 2002

Incertitude et hypothèses non-uniformes dans les bases de données déductives.
Proceedings of the 18èmes Journées Bases de Données Avancées, 2002

2001
Reasoning within Fuzzy Description Logics.
J. Artif. Intell. Res., 2001

A model of multimedia information retrieval.
J. ACM, 2001

2000
On the relationship between fuzzy logic and four-valued relevance logic
CoRR, 2000

1999
Foundations of a logic based approach to multimedia document retrieval.
PhD thesis, 1999

A System for the Fast Prototyping of Multidimensional Image Retrieval.
Proceedings of the IEEE International Conference on Multimedia Computing and Systems, 1999

User Profile Modeling and Applications to Digital Libraries.
Proceedings of the Research and Advanced Technology for Digital Libraries, 1999

1998
A Fuzzy Description Logic.
Proceedings of the Fifteenth National Conference on Artificial Intelligence and Tenth Innovative Applications of Artificial Intelligence Conference, 1998

1997
A Sequent Calculus for Reasoning in Four-Valued Description Logics.
Proceedings of the Automated Reasoning with Analytic Tableaux and Related Methods, 1997

A Four-Valued Fuzzy Propositional Logic.
Proceedings of the Fifteenth International Joint Conference on Artificial Intelligence, 1997

The Terminological Image Retrieval Model.
Proceedings of the Image Analysis and Processing, 9th International Conference, 1997

Modelling the Retrieval of Structured Documents Containing Texts and Images.
Proceedings of the Research and Advanced Technology for Digital Libraries. First European Conference, 1997

1996
A Relevance Terminological Logic for Information Retrieval.
Proceedings of the 19th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, 1996

1995
Default Reasoning in a Terminological Logic.
Comput. Artif. Intell., 1995

Document Retrieval by Relevance Terminological Logics.
Proceedings of the Final WorkShop on Multimedia Information Retrieval (MIRO'95), 1995

1993
A Model of Information Retrieval Based on a Terminological Logic.
Proceedings of the 16th Annual International ACM-SIGIR Conference on Research and Development in Information Retrieval. Pittsburgh, PA, USA, June 27, 1993

Default Inheritance Reasoning in Hybrid KL-ONE-Style Logics.
Proceedings of the 13th International Joint Conference on Artificial Intelligence. Chambéry, France, August 28, 1993

1991
A Computationally Tractable Terminological Logic.
Proceedings of the Third Scandinavian Conference on Artificial Intelligence, 1991


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