Now showing items 1-10 of 16
OCL-Lite: A decidable (yet expressive) fragment of OCL
UML has become a de facto standard in conceptual modeling. Class diagrams in UML allow one to model the data in the domain of interest by specifying a set of graphical constraints. However, in most cases one needs to provide ...
Best Service Synthesis in the Weighted Roman Model
This paper presents an extension of a framework for synthesizing a composition of services, named Roman Model, such that it is able to model the best service composition synthesis problem. In such extension, which we call ...
Quest: Efficient SPARQL-to-SQL for RDF and OWL
Query Processing under GLAV Mappings for Relational and Graph Databases
Schema mappings establish a correspondence between data stored in two databases, called source and target respectively. Query processing under schema mappings has been investigated extensively in the two cases where each ...
Introducing datatypes in DL-Lite
(IOS Press, 2012)
In Description Logics (DLs) and in the ontology-based data access (OBDA) scenario, the use of actual datatypes (such as those adopted in DBMSs) has received only limited attention, although datatypes, with their predefined ...
Semantically-governed data-aware processes
In this paper we consider processes that run over data stored in a relational database. Our setting is that of ontology-based data access (OBDA), where the information in the database is conceptually represented as an ...
Quest, an OWL 2 QL reasoner for ontology-based data access
Abstract. Ontology Based Data Access (OBDA) has drawn considerable attention from the OWL and RDF communities. In OBDA, instance data is accessed by means of mappings, which state the relationship between the data in a ...
View-based query answering in description logics: Semantics and complexity
View-based query answering is the problem of answering a query based only on the precomputed answers to a set of views. While this problem has been widely investigated in databases, it is largely unexplored in the context ...
Ontology-based governance of data-aware processes
In this paper we show how one can use the technology developed recently for Ontology-Based Data Access (OBDA) to govern data-aware processes through ontologies. In particular, we consider processes executed over a relational ...