Towards heterogeneous multimedia information systems: the Garlic approach

Carey, Michael J.; Haas, Laura M.; Schwarz, Peter; Arya, Manish; Cody, William F.; Fagin, Ronald; Flickner, Myron; Luniewski, Allen; Niblack, W.; Petković, Dragutin; Thomas, John; Williams, John H.; Wimmers, Edward L.

doi:10.1109/ride.1995.378736

Cited by 199 publications

(80 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Sets of cind's were always acyclic. This was ascertained by the use of predicate indexes such that the 6 Experiments with various kinds of random queries and constraints were carried out, too. In this article, we only report on chain queries, but the experiments with random queries were similarly favorable.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Query Rewriting with Symmetric Constraints

Koch

2002

Lecture Notes in Computer Science

View full text Add to dashboard Cite

We address the problem of answering queries using expressive symmetric inter-schema constraints which allow to establish mappings between several heterogeneous information systems. This problem is of high relevance to data integration, as symmetric constraints are essential for dealing with true concept mismatch and are generalizations of the kinds of mappings supported by both local-as-view and global-as-view approaches that were previously studied in the literature. Moreover, the flexibility gained by using such constraints for data integration is essential for virtual enterprise and e-commerce applications. We first discuss resolution-based methods for computing maximally contained rewritings and characterize computability aspects. Then we propose an alternative but semantically equivalent perspective based on a generalization of results relating to the database-theoretic problem of answering queries using views. This leads to a fast query rewriting algorithm based on AI techniques, which has been implemented and experimentally evaluated.

show abstract

Section: Methodsmentioning

confidence: 99%

“…This article addresses the query rewriting problem in semantic data integration in a very general form, as a proper generalization of the wellknown local-as-view (e.g., [20,12,3]) and global-asview approaches (e.g., [11,2,6]). …”

Section: Introductionmentioning

confidence: 99%

Query Rewriting with Symmetric Constraints

Koch

2002

Lecture Notes in Computer Science

View full text Add to dashboard Cite

show abstract

“…The focus is on encapsulating distribution with ACID guarantees. Later distributed database or middleware systems, such as Garlic [5], DISCO [6] or TSIMMIS [7], target large-scale heterogeneous data sources. Many of them employ a centralized mediator-wrapper based architecture (see Figure 1) to address the database heterogeneity in the sense that a single mediator server integrates distributed data sources through wrappers.…”

Section: Related Workmentioning

confidence: 99%

Dynamic Query Processing for P2P Data Services in the Cloud

Jurczyk

Xiong

2009

Lecture Notes in Computer Science

View full text Add to dashboard Cite

Abstract. With the trend of cloud computing, data and computing are moved away from desktop and are instead provided as a service from the cloud. Data-as-a-service enables access to a wealth of data across distributed and heterogeneous data sources in the cloud. We designed and developed DObjects, a general-purpose P2P-based query and data operations infrastructure that can be deployed in the cloud. This paper presents the details of the dynamic query execution engine within our data query infrastructure that dynamically adapts to network and node conditions. The query processing is capable of fully benefiting from all the distributed resources to minimize the query response time and maximize system throughput. We present a set of experiments using both simulations and real implementation and deployment.

show abstract

“…IBIS adopts innovative and state-of-the-art solutions to deal with all aspects of a complex data integration environment, including query answering under integrity constraints, limitations on source access, and source wrapping. Despite there are several mediation systems for data integration (see e.g., [7,6,11,18,22,21,12,9,1]), IBIS is the first system that fully exploits all available information (including integrity constraints) for query answering. Thus, to the best of our knowledge, IBIS is the first system actually devoted to semantic data integration.…”

Section: Introductionmentioning

confidence: 99%

“…In the GAV approach, a view over the sources is associated to each element of the global schema, describing how to populate such an element using the data at the sources. Most data integration systems adopt the GAV approach, e.g., TSIMMIS [7], Garlic [6], COIN [9], Squirrel [23,22], and MOMIS [1].…”

Section: Introductionmentioning

confidence: 99%

IBIS: Semantic Data Integration at Work

Calì

Calvanese

Giacomo

et al. 2003

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

View full text Add to dashboard Cite

Abstract. In this paper we present IBIS (Internet-Based Information System), a system for the semantic integration of heterogeneous data sources, which adopts innovative and state-of-the-art solutions to deal with all aspects of a complex data-integration environment, including query answering under integrity constraints and limitations on source access. IBIS is based on the global-as-view approach, using a relational mediated schema to query the data at the sources. Sources are wrapped so as to provide a relational view on them. A key issue is that the system allows the specification of integrity constraints (modeling constraints in the domain of interest) in the global schema. Since sources are autonomous, the extracted data in general do not satisfy the constraints. IBIS adapts and integrates the data extracted from the sources making use of the constraints in the global schema, so as to answer queries at best with the information available. IBIS deals with limitations in accessing data sources, and exploits techniques developed for querying sources with access limitations in order to retrieve the maximum set of answers. In particular, it may use integrity constraints available on the sources to improve the efficiency of the extraction process.

show abstract

Towards heterogeneous multimedia information systems: the Garlic approach

Cited by 199 publications

References 22 publications

Query Rewriting with Symmetric Constraints

Query Rewriting with Symmetric Constraints

Dynamic Query Processing for P2P Data Services in the Cloud

IBIS: Semantic Data Integration at Work

Contact Info

Product

Resources

About