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Information Integration for Heterogeneous Data Sources

Er. Majid Zaman
2012 IOSR Journal of Engineering  
used in data integration for the purpose of integrating information systems, at the same is not cost effective.  ...  integrated from heterogeneous data sources into single data source are faced upon by major challenge of information transformation-were in different formats and constraints in data transformation are  ...  Query Processing Another issue that had to be redefined in Data Integration scenarios is query processing.  ... 
doi:10.9790/3021-0204640643 fatcat:3bzfghxuozar3myyn3hdmlegmu

WordNet Ontology Based Query Reformulation and Optimization using Disjunctive Clause Elimination

K Amshakala, Nedunchezhian
2011 International Journal of Database Management Systems  
As data integration has been automated, the ambiguity in concept interpretation also known as semantic heterogeneity has become one of the main obstacles to this process.  ...  The reformulated query is optimized by removing disjunctive clauses in the query to reduce the computational cost of the semantic query execution.  ...  RELATED WORK Use of the semantic knowledge in query generation and query reformulation is used in two ways in database management systems, one for query optimization and other for data integration [1,  ... 
doi:10.5121/ijdms.2011.3405 fatcat:pzadxzxysbdpnhjtsye3mwt4s4

Biological data integration: wrapping data and tools

Z. Lacroix
2002 IEEE Transactions on Information Technology in Biomedicine  
Nowadays scientific data is inevitably digital and stored in a wide variety of formats in heterogeneous systems.  ...  Scientists need to access an integrated view of remote or local heterogeneous data sources with advanced data accessing, analyzing, and visualization tools.  ...  INTRODUCTION A LARGE part of the work of scientists today consists in querying multiple remote or local heterogeneous data sources, integrating manually retrieved data and manipulating it with advanced  ... 
doi:10.1109/titb.2002.1006299 pmid:12075666 fatcat:cs2zc5efwffu5pdxlxsc6oenpi

Data Integration - Challenges, Techniques and Future Directions: A Comprehensive Study

Bazeer Ahamed, T. Ramkumar
2016 Indian Journal of Science and Technology  
Data integration techniques mainly focusing on integration of data in several levels and applying independent or unified query over the data available.  ...  Optimizing the queries depending on the data source is also another major requirement to provide efficient and faster results reducing the data retrieval latencies.  ...  The efficiency of query retrieval lies entirely on the processing efficiency of the wrappers. Size of the data source and the number of data sources is oblivious to the integration engine.  ... 
doi:10.17485/ijst/2016/v9i44/105314 fatcat:pkn5vfp64naanfbseicc446lte

Visual media retrieval using transform-based layered query scheme

E. Guldogan, M. Gabbouj, O. Guldogan
2005 IEEE International Conference on Image Processing 2005  
The experiments reveal that 75% retrieval performance improvement in terms of process time can be achieved depending on transformation parameters.  ...  Keywords-content-based indexing and retrieval; retrieval optimization; query system.  ...  Query performance optimization during retrieval consists of three main groups of problems: • Processing time and computational complexity, • Disk and run-time memory space requirements, and • Semantic  ... 
doi:10.1109/icip.2005.1529802 dblp:conf/icip/GuldoganGG05 fatcat:czut5dis3rfiphczx6ud7dj7om

Multistore Big Data Integration with CloudMdsQL [chapter]

Carlyna Bondiombouy, Boyan Kolev, Oleksandra Levchenko, Patrick Valduriez
2016 Lecture Notes in Computer Science  
In this paper, we propose a functional SQL-like query language (based on CloudMdsQL) that can integrate data retrieved from different data stores, to take full advantage of the functionality of the underlying  ...  In particular, much attention is being paid on the integration of unstructured big data typically stored in HDFS with relational data.  ...  for early reducing of the size of data processed and retrieved from the data stores.  ... 
doi:10.1007/978-3-662-53455-7_3 fatcat:iua5xhkl45hm3be5g4j5w2neum

IBIS: Semantic Data Integration at Work [chapter]

Andrea Calì, Diego Calvanese, Giuseppe De Giacomo, Maurizio Lenzerini, Paolo Naggar, Fabio Vernacotola
2003 Lecture Notes in Computer Science  
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.  ...  Since the extraction process is the major bottleneck in the integration of data over the Web, specific optimization techniques have been developed.  ... 
doi:10.1007/3-540-45017-3_8 fatcat:wo4k4e6jozhpdaybxubdizanui

Experimenting Data Integration with DIS@DIS [chapter]

Andrea Calì, Domenico Lembo, Riccardo Rosati, Marco Ruzzi
2004 Lecture Notes in Computer Science  
DIS@DIS incorporates novel optimization techniques for query processing, which speed up query answering time even in the presence of complex global schemata and large amounts of data.  ...  In this paper we present DIS@DIS, a data integration system that adopts innovative techniques for query answering in a complex integration environment.  ...  DIS@DIS implements novel optimization techniques for checking the consistency of data, which is a costly step in query processing. 4.  ... 
doi:10.1007/978-3-540-25975-6_6 fatcat:cttvqylnmvb35i4phpkoumkwiy

A New Digital Conceptual Model Oriented Corporate Memory Constructing: Taking Data Mining Models as a Case

Choukri Djellali
2013 Procedia Computer Science  
Most of the proposed approaches provide limited support for all activities of the engineering process, in particular, the phase of integration.  ...  The integration of knowledge can be considered as a guideline for managing problems that occur in the task of knowledge management, and more particularly, in the collaborative decision-making.  ...  of data stored in the integration systems).  ... 
doi:10.1016/j.procs.2013.06.136 fatcat:axtzawmruffptkrwql7dbnx7iu

Does it Take a Village: Family and Inter-Corporate Ownership and Inter-Corporate Networks

Jean McGuire
2016 Academy of Management Proceedings  
These techniques are used in DISGO data integration system intended for integrating data in distributed corporate network.  ...  The article concerns the task of integrating initially isolated independent databases (DB), which store the data of some common domain. Techniques and tools for solving this task are discussed.  ...  The three basic approaches to description of schemas main way of query optimization in DISGO data integration mappings (or their modifications).  ... 
doi:10.5465/ambpp.2016.14543abstract fatcat:rtbobecwprbxbljnkuy2sxlvqa

Storing and Provisioning Linked Data as a Service [chapter]

Johannes Lorey
2013 Lecture Notes in Computer Science  
In this work, we argue for a Data-as-a-Service approach combining both warehousing and query federation to discover and consume Linked Data.  ...  We compare our work to state-of-the-art approaches for discovering, integrating, and consuming Linked Data.  ...  As with data integration, most research in retrieving RDF Data by federated query processing is based on related work in distributed relational data management.  ... 
doi:10.1007/978-3-642-38288-8_48 fatcat:mtkwfovbmbfupgd5f4t3bx4x3q

Assessment and Optimization of User Imprecise Queries in Cloud Environments

Pichaimuthu Mohankumar, Balusamy Balamurugan
2017 International Journal of Intelligent Engineering and Systems  
To address optimization issues in this paper, we proposed the techniques for optimizing the queries to provide customers with fast data retrieval.  ...  In our model, Query processing: A 3-step process that transforms a high-level query (MongoDB) into an equivalent and more efficient lower-level query (relational algebra).  ...  To address optimization issues in this paper, we proposed the techniques for optimizing the queries to provide customers with fast data retrieval.  ... 
doi:10.22266/ijies2017.0630.14 fatcat:hp3z7uso7vbchafsj4ceejg3xi

Multiresolution Query Optimization in an Online Environment [chapter]

Kai Xu, Xiaofang Zhou
2005 Lecture Notes in Computer Science  
The performance of such systems relies on data transmission over network and multiresolution query processing.  ...  In this paper, we aim to improve multiresolution query processing in an online environment. A cost model for such query is proposed first, followed by three strategies for its optimization.  ...  Therefore, our third optimization strategy takes a different perspective and try to integrate MTM and query processing, i.e., including query processing information in MTM node, to preclude the inherent  ... 
doi:10.1007/978-3-540-31849-1_70 fatcat:zcfbmjyumvaobgstfrm5nzilfy

Query optimization for OLAP-XML federations

Dennis Pedersen, Karsten Riis, Torben Bach Pedersen
2002 Proceedings of the 5th ACM international workshop on Data Warehousing and OLAP - DOLAP '02  
In this paper we present novel techniques for query optimization in federations of OLAP and XML databases.  ...  Physically integrating unexpected data into such systems is a long and time-consuming process making logical integration, i.e., federation, the better choice in many situations.  ...  OPTIMIZING XML DATA RETRIEVAL The second technique is focused on the special kind of XML queries that are used in the federation.  ... 
doi:10.1145/583890.583899 dblp:conf/dolap/PedersenRP02 fatcat:k4txlt34pzbzlff6l7amil5sji

Querying the deep web

Andrea Calì, Davide Martinenghi
2010 Proceedings of the 13th International Conference on Extending Database Technology - EDBT '10  
We survey techniques to optimize query processing on the Deep Web, in a setting where data are represented in the relational model.  ...  We illustrate optimizations both at query plan generation time and at runtime, highlighting the role of integrity constraints.  ...  Andrea Calì was supported by the EPSRC project "Schema Mappings and Automated Services for Data Integration and Exchange" (EP/E010865/1).  ... 
doi:10.1145/1739041.1739138 dblp:conf/edbt/CaliM10 fatcat:db2zx6oxjbdg3lzkmm5d3lixfm
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