[PDF] Top 20 Ontology-Based Query in Heterogeneous & Distributed Data Sources

... Ontology is a specification of the agent knowledge about the world. It specifies an agent’s knowledge of the world including the agent’s knowledge about its domain of existence and communication ability (both ... See full document

... annotation based on recourse description framework (RDF), XLINK, ...windows. Heterogeneous grid database is in xml/ schema for semantic query and represents the knowledge in semantic acquired ...The ... See full document

... semantic data mapping ...of data schemas and learning information on every data source, the second activity is to construct the semi- automatic data mapping using D2RQ, the third activity is ... See full document

... allows heterogeneous, distributed querying encompassing semantic enrichment and personalization mechanisms for query ...to query the emerging ‘Internet of things’ or Future Inter- ... See full document

... Visual query formulation is a long-standing en- deavour, and as such it has accumulated a consider- able number of studies over ...instance, query by example (QBE) ...textual query languages as users ... See full document

... The distributed query optimization has several problems related to cost model, large set of queries, optimization cost and optimization ...of Query Optimization in Heterogeneous ... See full document

... of data integrating technologies to offer value added services and richer ...and heterogeneous data sources, mediation systems have appeared as a challenging but nevertheless efficient ... See full document

... manipulate data. When data is spread across various databases, there will be some integration needed to be ...the distributed data ...for data interchange and ...universal data ... See full document

... manipulating data transparently across multiple distributed ...various heterogeneous data sources. To answer user queries, a data integration system employs a set of semantic ... See full document

... is based on the third approach, mediator-based integration, which establishes a transparent access to heterogeneous data sources without physically copying them into a single ... See full document

... in ontology-based data ...underlying data integration ...the data sources, ...allows query answering in data integration systems under evolving ontologies without ... See full document

... supply ontology lan- guages and query answering technologies for ontology-based data access (OBDA), a way of querying in- complete data sources that uses ontologies to ... See full document

... of data cleaning approaches, their advantages and shortcomings to be performed on heterogeneous ...that Data cleaning is not only useful for data warehousing but also it is favourable for ... See full document

... new data from the Data Source-1 unit Data Source-n and return the data to Gathering web ...corresponding data source to retrieve the updated and new ...retrieved data from all ... See full document

... geographically distributed, real world data that would have to be used in a context distinct from which that original data had been designed to ...acquisition, ontology development to mediate ... See full document

... view-based query pro cessing, in particular for the case of rich languages for semi structured data, for the case of exact views, and for the case of integrity constraints in the global ...schema. ... See full document

... scale data sharing, coordination techniques are becoming more and more ...and distributed among multiple autonomous sources, making data retrieval a complicated ...these sources: Shared ... See full document

... Querying heterogeneous data sources as a single resource Capability-based federation of standard Web Service components Unified data access/query and display from a single access point t[r] ... See full document

... new data being generated from a variety of ...a data environment that is constantly changing. To make use of these data, there has been an in- creasing interest in investigating semantic and ... See full document

... Query heterogeneous data sources as a single resource Capability-based federation of standard GIS Web Service components Unified data access/query and display from a single access point [r] ... See full document