Results 1 to 10 of about 1,760,038 (218)

Data integration under integrity constraints [PDF]

Information Systems, 2002
Data integration systems provide access to a set of heterogeneous, autonomous data sources through a so-called global schema. There are basically two approaches for designing a data integration system. In the global-as-view approach, one defines the elements of the global schema as views over the sources, whereas in the local-as-view approach, one ...
Andrea Cali, Diego Calvanese, DE GIACOMO, Giuseppe, LENZERINI, Maurizio   +3 more
openaire   +7 more sources

Stratified Data Integration [PDF]

CoRR, 2021
We propose a novel approach to the problem of semantic heterogeneity where data are organized into a set of stratified and independent representation layers, namely: conceptual(where a set of unique alinguistic identifiers are connected inside a graph codifying their meaning), language(where sets of synonyms, possibly from multiple languages, annotate ...
Giunchiglia F., Zamboni A., Bagchi M., Bocca S.   +3 more
openaire   +3 more sources

Using linked administrative data to build a Social Disparities Index for Covid-19 to evaluate the effects of inequalities on pandemic in Brazil.

International Journal of Population Data Science, 2022
Objective Brazil is one of the most unequal countries in the world. We aimed to create a Social Disparities Index for Covid-19 (SDI-Covid-19) using linked administrative data to understand the role of inequalities in the COVID-19 pandemic to target ...
Maria Yury Travassos Ichihara, Rosemeire Leovigildo Fiaccone, Lilia Carolina Carneiro da Costa, Aline Grimberg Pereira de Medeiros, Elzo Pereira Pinto Junior, Rafael Felipe da Silva Souza, Mauricio Lima Barreto, Anderson Ara, Emmanuelle Goes, Julia M Pescarini, Marcos Ennes Barreto, Jaime Gregorio   +11 more
doaj   +1 more source

Factors associated with postpartum psychiatric disorders using routine administrative data

International Journal of Population Data Science, 2022
Background Almost twenty percent of women worldwide experience mental health disorders following childbirth. Despite their importance and consequences, postpartum psychiatric disorders are still under-investigated.
Flávia Jôse Oliveira Alves, Luis F Castro-de-Araujo, Erika Fialho Morais Xavier, Daiane Borges Machado, Maurício L Barreto   +4 more
doaj   +1 more source

Perceptions and experiences on data sharing and linkage for research and the evaluation of public health policy.

International Journal of Population Data Science, 2022
Objectives This research seeks to understand viewpoints on the use of data containing personally identifiable information by a range of organizations for divergent purposes, focusing on the sharing and linkage of administrative data for the purposes of ...
Bethania de Araujo Almeida, Denise Moraes Pimenta, Mauricio Barreto   +2 more
doaj   +1 more source

DATA INTEGRATION IN DATA WAREHOUSING [PDF]

International Journal of Cooperative Information Systems, 2001
Information integration is one of the most important aspects of a Data Warehouse. When data passes from the sources of the application-oriented operational environment to the Data Warehouse, possible inconsistencies and redundancies should be resolved, so that the warehouse is able to provide an integrated and reconciled view of data of the ...
Diego Calvanese, DE GIACOMO, Giuseppe, LENZERINI, Maurizio, NARDI, Daniele, ROSATI, Riccardo   +4 more
openaire   +2 more sources

Public engagement experiences in research using data administrative linkage to build a Social Disparities Index for Covid-19 in Brazil.

International Journal of Population Data Science, 2022
Objectives Public engagement is an important pilar to add new perspectives as take into consideration participants' interests in research. We aim to share the potential of Cidacs experience with data administrative linkage for creating the Social ...
Maria Y. Ichihara, Adalton dos Anjos Fonseca, Mariana Rodrigues Sebastião, Denise Moraes Pimenta   +3 more
doaj   +1 more source

Algebraic data integration [PDF]

Journal of Functional Programming, 2017
Abstract In this paper, we develop an algebraic approach to data integration by combining techniques from functional programming, category theory, and database theory. In our formalism, database schemas and instances are algebraic (multi-sorted equational) theories of a certain form. Schemas denote categories, and
Patrick Schultz, Ryan Wisnesky
openaire   +2 more sources

Examining the quality of record linkage process using nationwide Brazilian administrative databases to build a large birth cohort

BMC Medical Informatics and Decision Making, 2020
Background Research using linked routine population-based data collected for non-research purposes has increased in recent years because they are a rich and detailed source of information.
Daniela Almeida, David Gorender, Maria Yury Ichihara, Samila Sena, Luan Menezes, George C. G. Barbosa, Rosimeire L. Fiaccone, Enny S. Paixão, Robespierre Pita, Mauricio L. Barreto   +9 more
doaj   +1 more source

Data integration with uncertainty [PDF]

The VLDB Journal, 2008
This paper reports our first set of results on managing uncertainty in data integration. We posit that data-integration systems need to handle uncertainty at three levels, and do so in a principled fashion. First, the semantic mappings between the data sources and the mediated schema may be approximate because there may be too many of them to be ...
Xin Luna Dong, Alon Y. Halevy, Cong Yu 0001   +2 more
openaire   +2 more sources