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Ontologies and Databases: The DL-Lite Approach [chapter]

Diego Calvanese, Giuseppe De Giacomo, Domenico Lembo, Maurizio Lenzerini, Antonella Poggi, Mariano Rodriguez-Muro, Riccardo Rosati
2009 Lecture Notes in Computer Science  
Such algorithms exploit the distinguishing feature of the logics in the DL-Lite family, namely that ontology reasoning and answering unions of conjunctive queries is first-order rewritable, i.e., it can  ...  We analyze also the effect of extending the logic with typical DL constructs, and show that for most such extensions, the nice computational properties of the DL-Lite family are lost.  ...  This research has been partially supported by the FET project TONES (Thinking ONtologiES), funded within the EU 6th Framework Programme under contract FP6-7603, and by the large-scale integrating project  ... 
doi:10.1007/978-3-642-03754-2_7 fatcat:2dcgsej46bhanizxkttnn62p6y

Ontology-Based Data Access and Integration [chapter]

Diego Calvanese, Giuseppe De Giacomo, Domenico Lembo, Maurizio Lenzerini, Riccardo Rosati
2017 Encyclopedia of Database Systems  
and objects represented in the ontology.  ...  Furthermore, we provide means to access databases that are independent from the ontology, by proposing a novel mapping language that solves the so-called "impedance mismatch" between values in the databases  ...  Following the classical approach in DLs, the semantics of DL-Lite F R is given in terms of first-order logic interpretations.  ... 
doi:10.1007/978-1-4899-7993-3_80667-1 fatcat:cyfckesenngyxcibe6mykqzy2q

Query Rewriting and Optimization for Ontological Databases

Georg Gottlob, Giorgio Orsi, Andreas Pieris
2014 ACM Transactions on Database Systems  
Ontological queries are evaluated against a knowledge base consisting of an extensional database and an ontology (i.e., a set of logical assertions and constraints that derive new intensional knowledge  ...  The evaluation and optimization of such queries is an intriguing new problem for database research.  ...  ACKNOWLEDGMENTS We thank Michaël Thomazo for his useful and constructive comments on the conference version of this article.  ... 
doi:10.1145/2638546 fatcat:xxkpcmt7inbafjnsxylt7vw4ni

Query Rewriting and Optimization for Ontological Databases [article]

Georg Gottlob, Giorgio Orsi, Andreas Pieris
2014 arXiv   pre-print
Ontological queries are evaluated against a knowledge base consisting of an extensional database and an ontology (i.e., a set of logical assertions and constraints which derive new intensional knowledge  ...  The evaluation and optimization of such queries is an intriguing new problem for database research.  ...  Such DLs are EL [Baader 2003 ] and the members of the DL-Lite family [Calvanese et al. 2007; Poggi et al. 2008 ], i.e., DL-Lite R , DL-Lite F and DL-Lite A .  ... 
arXiv:1405.2848v1 fatcat:wjvdjgtkrba4xat7ha6xuqo6zy

Efficient Processing of Huge Ontologies in Logic and Relational Databases [chapter]

Timo Weithöner, Thorsten Liebig, Günther Specht
2004 Lecture Notes in Computer Science  
Thus database technology is required for storing and processing huge ontologies. In this paper we present an efficient technique for representing and reasoning with ontologies in databases.  ...  Today ontologies are heavily used in the sematic web. As they grow in size reasoning systems can't work without secondary storage anymore.  ...  Mapping Ontologies into Logic Programs Converting ontologies into description logic programs (DLP; DLP covers most of OWL 1 Lite plus a portion of OWL DL, namely general concept inclusions with disjunction  ... 
doi:10.1007/978-3-540-30470-8_13 fatcat:56uhozdhlvanbmz74luobge5tm

Effective support of databases with ontological dependencies: Relational languages instead of description logics

L. A. Kalinichenko
2012 Programming and computer software  
The main part of the paper is devoted to the survey of the development of relational database languages providing broader and more efficient support of queries over databases with the ontological dependencies  ...  The paper provides a brief survey of the languages for efficient support of access to the databases satisfying the ontological dependencies.  ...  ACKNOWLEDGMENTS This work was supported in part by the Russian Foundation for Basic Research (project nos. 10 07 00342 a and 11 07 00402 a) and by the Presidium of the Russian Academy of Sciences (the  ... 
doi:10.1134/s0361768812060059 fatcat:aezozh4o6rctjft47p3uny4lnm

Connecting Databases and Ontologies: A Data Quality Perspective

Horacio Tellez Perez, Jef Wijsen
2019 International Workshop on Description Logics  
Taking a database-theoretic perspective on the problem of mapping relational databases to ontologies, we come up with a new mapping language that is inspired by the semijoin algebra.  ...  We illustrate the user friendliness of the mapping language by examples, and prove the decidability of some important reasoning problems by embedding our mapping language into the guarded fragment of first-order  ...  Let (Σ, M, T ) be a DB2KB such that Σ = ∅ and T is a DL-Lite core TBox.  ... 
dblp:conf/dlog/PerezW19 fatcat:5lo4op3mo5hhjpqdcrwipirrm4

Use of OWL and SWRL for Semantic Relational Database Translation

Matt Fisher, Mike Dean, Gregory Joiner
2008 W3C Web Ontology Language (OWL) Experiences and Directions Workshop (OWLED)  
In this paper, we discuss Automapper, a tool that automatically generates data source and mapping ontologies using OWL and SWRL.  ...  We also describe the use of these ontologies in our Semantic Distributed Query architecture, an implementation for mapping RDF queries to disparate data sources, including SQL-compliant databases, using  ...  Thus, Automapper should produce OWL that is restricted to DL-Lite. Future Work We are currently applying Automapper's approach to other Semantic Bridges.  ... 
dblp:conf/owled/FisherDJ08 fatcat:kdbfg66pajhtjiv7iywhxfdevu

TRANSFORMING ONTOLOGY REPRESENTATION FROM OWL TO RELATIONAL DATABASE

Ernestas Vysniauskas, Lina Nemuraite
2006 Information Technology and Control  
From the other side, the relational database technology has ensured the best facilities for storing, updating and manipulating the information of problem domain.  ...  The algorithms for transformation of domain ontology, described in OWL, to relational database are proposed. The methodology is illustrated with an example.  ...  Lite, OWL Description Logic (DL) and OWL Full.  ... 
doi:10.5755/j01.itc.35.3.11779 fatcat:n5vy6f2f5vf5deeugkr5umviqy

Automatic Transformation of Relational Database Schema into OWL Ontologies

Imants Zarembo
2015 Environment Technology Resources Proceedings of the International Scientific and Practical Conference  
between relational database schema and OWL ontologies are described; the transformation rules are defined and the transformation tool's prototype is developed to perform the described transformation.  ...  </span></p><p class="R-AbstractKeywords"><span lang="EN-US">To conduct a successful transformation it is necessary to identify the differences between relational database schema and ontology information  ...  Fig. 13 . 13 Screenshot of ontology matching tool prototype VI MATCHING TOOL OWL Lite, OWL DL and OWL Full.  ... 
doi:10.17770/etr2015vol3.170 fatcat:4c422a5iejaergwnps7ty3vil4

An Ontology Based Text Analytics on Social Media

Pankajdeep Kaur, Pallavi Sharma
2015 International Journal of Database Theory and Application  
At the end, this paper presents our proposed work based on ontology framework to cope up with excessive social media textual data.  ...  Text mining involves the process of structuring the input data, deriving patterns within the structured data and lastly interpretation and revelation of the output.  ...  Web Ontology Language is mainly divided into 3 types:- OWL-Lite OWL-Lite is the easiest version of the OWL family.  ... 
doi:10.14257/ijdta.2015.8.5.20 fatcat:ynwrsn6erbbc5dlrugyxrgmoye

SoftFacts: A top-k retrieval engine for ontology mediated access to relational databases

Umberto Straccia
2010 2010 IEEE International Conference on Systems, Man and Cybernetics  
We outline SoftFacts, an ontology mediated top-k information retrieval system over relational databases.  ...  An ontology layer is used to define (in terms of a OWL-QL like Semantic Web language) the relevant abstract concepts and relations of the application domain, while graded facts are stored into a relational  ...  We also refer the reader to [5] for a crisp, main memory, DL-Lite implementation and application, and to [13] for a fuzzy DL-Lite language in the spirit of [20] (and less expressive language than  ... 
doi:10.1109/icsmc.2010.5641780 dblp:conf/smc/Straccia10 fatcat:jgkqdrmg25bqrmfugyirt64wom

Well-founded semantics for extended datalog and ontological reasoning

André Hernich, Clemens Kupke, Thomas Lukasiewicz, Georg Gottlob
2013 Proceedings of the 32nd symposium on Principles of database systems - PODS '13  
The UNA is also rather common in logic programming and databases in general, as well as in some important DLs, such as the DL-Lite family of tractable description logics [5, 6] .  ...  Consider the DL-Lite R, ,not -ontology T : Person, Employed, not∃JobSeekerID ∃EmployeeID, Person, notEmployed, not∃EmployeeID ∃JobSeekerID, ∃EmployeeID − not∃JobSeekerID − ValidID.  ...  This work was supported by the EPSRC grant EP/H051511/1 "ExODA:  ... 
doi:10.1145/2463664.2465229 dblp:conf/pods/HernichKLG13 fatcat:t7rioz4oobgj3i5pptex7aegpq

X-SOM: A Flexible Ontology Mapper

Carlo Curino, Giorgio Orsi, Letizia Tanca
2007 Database and Expert Systems Applications  
In this paper we present X-SOM: an ontology mapping and integration tool.  ...  The contribution of our tool is a modular and extensible architecture that automatically combines several matching techniques by means of a neural network, performing also ontology debugging to avoid inconsistencies  ...  Test family L includes two tests that map ontologies with different expressive powers (OWL-DL, OWL-Lite and OWL-Full 1 ).  ... 
doi:10.1109/dexa.2007.4312929 fatcat:3ot3xwxhjnf3bi3mm77efd5eea

A framework for OWL DL based Ontology Construction from Relational Database using Mapping and Semantic Rules

C. Ramathilagam, M. L. Valarmathi
2013 International Journal of Computer Applications  
Keywords Semantic web, schema, mapping, Ontology, RDF, RDFS, OWL, DL RDB to Ontology mapping process or the classification of RDB to Ontology mapping can be done in any one of the following ways.  ...  Ontologies lack semantically rich data because the manual construction of these documents are time consuming and also the domain experts need to understand the syntax and semantics of Ontology development  ...  Lei Zhang, Jing Li [8] provided an approach for automatic generation of Ontology based on database by analysing the Ontology and database by constructing rules of Ontology elements based on RDB and provides  ... 
doi:10.5120/13341-0776 fatcat:bv6xtulgjfdufgzeg5xt4xkyz4
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