Exploració per autor "Teniente López, Ernest"
Ara es mostren els items 73-92 de 103
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Reasoning on the usage control security policies over data artifact business process models
Estañol Lamarca, Montserrat; Varela Vaca, Ángel Jesús; Gómez López, María Teresa; Teniente López, Ernest; Martínez Gasca, Rafael (2022)
Article
Accés obertThe inclusion of security aspects in organizations is a crucial aspect to ensure compliance with both internal and external regulations. Business process models are a well-known mechanism to describe and automate the ... -
Reasoning on UML class diagrams with OCL constraints
Queralt Calafat, Anna; Teniente López, Ernest (2006-04)
Report de recerca
Accés obertWe propose a new approach to check whether a given UML class diagram with its OCL integrity constraints satisfies a set of desirable properties such as schema satisfiability, class liveliness, redundancy of integrity ... -
Reasoning on UML data-centric business process models
Estañol Lamarca, Montserrat; Sancho Samsó, María Ribera; Teniente López, Ernest (Springer, 2013)
Text en actes de congrés
Accés restringit per política de l'editorialVerifying the correctness of data-centric business process models is important to prevent errors from reaching the service that is offered to the customer. Although the semantic correctness of these models has been studied ... -
Semantics for connectivity management in IoT sensing
Vila Gómez, Marc; Sancho Samsó, María Ribera; Teniente López, Ernest; Vilajosana Guillén, Xavier (Springer Nature, 2021)
Text en actes de congrés
Accés obertThere are a large number of Internet of Things (IoT) devices that transmit information over the Internet, each with a different data format to denote the same semantic concept. This often leads to data incompatibilities ... -
Simplification of UML/OCL schemas for efficient reasoning
Oriol Hilari, Xavier; Teniente López, Ernest (2017-06-01)
Article
Accés obertEnsuring the correctness of a conceptual schema is an essential task in order to avoid the propagation of errors during software development. The kind of reasoning required to perform such task is known to be exponential ... -
Soundness and completeness of the events method
Teniente López, Ernest (1992)
Report de recerca
Accés obertWe have proposed a new method, which we call the Events Method, for view updating in deductive databases. In this paper we prove that this method is sound and complete for stratified databases. -
Specifying artifact-centric business process models in UML
Estañol Lamarca, Montserrat; Queralt Calafat, Anna; Sancho Samsó, María Ribera; Teniente López, Ernest (Springer, 2015-04-01)
Capítol de llibre
Accés obertIn recent years, the artifact-centric approach to process mod- eling has attracted a lot of attention. One of the research lines in this area is finding a suitable way to represent the dimensions in this approach. Bearing ... -
Specifying artifact-centric business process models in UML: technical report
Estañol Lamarca, Montserrat; Queralt Calafat, Anna; Sancho Samsó, María Ribera; Teniente López, Ernest (2015-05-19)
Report de recerca
Accés obertIn recent years, the artifact-centric approach to process modeling has attracted a lot of attention. One of the research lines in this area is finding a suitable way to represent the dimensions in this approach. Bearing ... -
Strict and extended interpretations of operation contracts in conceptual modeling
Queralt Calafat, Anna; Teniente López, Ernest (2005-05)
Report de recerca
Accés obertThis paper describes two different ways of understanding operation contracts in conceptual modeling. The main difference between them lies in the way operation postconditions and integrity constraints are guaranteed, which ... -
Structuring the process of integrity maintenance (extended version)
Mayol Sarroca, Enric; Teniente López, Ernest (1997-07)
Report de recerca
Accés obertTwo different approaches have been traditionally considered for dealing with the process of integrity constraints enforcement: integrity checking and integrity maintenance. However, while previous research in the first ... -
Testing Termination of Query Satisfiability Checking on Expressive Database Schemas
Rull Fort, Guillem; Farré Tost, Carles; Teniente López, Ernest; Urpí Tubella, Antoni (2010-03-19)
Report de recerca
Accés obertA query is satisfiable if there is at least one consistent instance of the database in which it has a non-empty answer. Defining queries on a database schema and checking their satisfiability can help the database designer ... -
The Constructive method for query containment checking (extended version)
Farré Tost, Carles; Teniente López, Ernest; Urpí Tubella, Antoni (1999-07)
Report de recerca
Accés obertWe present a new method that checks Query Containment for queries with negated derived atoms and/or integrity constraints. Existing methods for Query Containment checking that deal with these cases do not check actually ... -
The Intensional events method for consistent view updating
Costal Costa, Dolors; Teniente López, Ernest; Urpí Tubella, Antoni (1996-07)
Report de recerca
Accés obertAn important amount of research has been devoted to consistent view updating. In this paper we propose a method that follows a new approach to deal with this problem. Our approach is aimed at obtaining intensional ... -
The internal events method for view updating in deductive databases
Teniente López, Ernest (Universitat Politècnica de Catalunya. Departament de Llenguatges i Sistemes Informàtics, 1990)
Text en actes de congrés
Accés obertWe propose a new method for view updating in deductive databases. The method augments a database with a set of transition and intemal events rules, which explicitly define the insertions and deletions induced by a database ... -
TINTIN : comprobación incremental de aserciones SQL
Oriol Hilari, Xavier; Teniente López, Ernest; Rull, Guillem (2016)
Text en actes de congrés
Accés obertNinguno de los SGBD más populares del momento implementa aserciones SQL, obligando así a implementar manualmente su comprobación. Por ello, presentamos TINTIN: una aplicación que genera automáticamente el código SQL para ... -
TINTIN: a Tool for INcremental INTegrity checking of Assertions in SQL Server
Oriol Hilari, Xavier; Teniente López, Ernest; Rull, Guillem (2016)
Comunicació de congrés
Accés obertWe present TINTIN, a tool to perform efficient integrity checking of SQL assertions in SQL Server. TINTIN rewrites each assertion into a set of standard SQL queries that, given a set of insertions and deletions of tuples, ... -
Transformation techniques for OCL constraints
Cabot Sagrera, Jordi; Teniente López, Ernest (2006-09)
Report de recerca
Accés obertConstraints play a key role in the definition of conceptual schemas. In the UML, constraints are usually specified by means of invariants written in the OCL. However, due to the high expressiveness of the OCL, the designer ... -
Una anàlisi d'Excelerator/IS com a eina per a especificar sistemes d'informació
Grané Mora, Jaume; Selfa, V; Teniente López, Ernest (Asociación de Técnicos de Informática, 1993-09)
Article
Accés obert -
Updating knowledge bases while maintaining their consistency
Teniente López, Ernest; Olivé Ramon, Antoni (1994-04)
Report de recerca
Accés obertIn this paper we propose a new method for updating knowledge bases while maintaining their consistency. Our method can be used for integrity constraints maintenance, view updating, and their combination. It can also be ... -
UQJG: Identifying transactions that collaborate to violate an SQL assertion
Koppelaars, Toon; Oriol Hilari, Xavier; Teniente López, Ernest; Curto Pasinello, Sergi; Pujol, Eduard (Association for Computing Machinery (ACM), 2021)
Text en actes de congrés
Accés obertAn SQL assertion is a declarative statement about data that must always be satisfied in any database state. Assertions were introduced in the SQL92 standard but no commercial DBMS has implemented them so far. Some approaches ...