A web of linked RDF data may be enabled by standards specifying how links should be made in RDF and under what conditions they should be followed as well as powerful generic RDF browsers that can traverse an open web of RDF resources. The Tabulator is an RDF browser, which is designed both for new users to provoke interest in the Semantic Web and give them a means to access and interact with th...

The Resource Description Framework (RDF) is an interoperable data representation format suitable for interchange and integration of data, especially in Open Data contexts. However, RDF is also becoming increasingly attractive in scenarios involving sensitive data, where data protection is a major concern. At its core, RDF does not support any form of access control and current proposals for ext...

RDF is the first W3C standard for enriching information resources of the Web with detailed meta data. The semantics of RDF data is defined using a RDF schema. The most expressive language for querying RDF is RQL, which enables querying of semantics. In order to support RQL, a RDF storage system has to map the RDF graph model onto its storage structure. Several storage systems for RDF data have ...

With the wide application of RDF(Resource Description Framework) data, the data volume grows rapidly. Therefore, RDF storage has become a hot research issue in data storage field currently. Distributed storage is an effective way to solve the storage and query of RDF data, and data partition is the premise of data distributed storage. In this paper we use graph clustering idea to realize the ef...

A field experiment was planned and conducted during Rabi 2012-13 to evaluate the “Soil nutrient status of chickpea (Cicer arietinum L.) as influenced by potassium zinc application in Vertisol”. The at Departmental Research Farm Vasantrao Naik Marathwada Agricultural University, Parbhani, laid out Randomized Block Design with three replications. There were eight treatments comprising K levels vi...

There are many case studies for which the formulation of RDF constraints and the validation of RDF data conforming to these constraint is very important. As a part of the collaboration with the W3C and the DCMI working groups on RDF validation, we identified major RDF validation requirements and initiated an RDF validation requirements database which is available to contribute at http://purl.or...

RDF ontologies are rapidly increasing in number. We study the problem of integrating two RDF ontologies under a given set of Horn clauses that specify semantic relationships between terms in the ontology, as well as under a given set of negative constraints. We formally define the notion of a “witness” to the integrability of two RDF ontologies under such constraints. A witness represents a way...

RDF has been proposed by W3C as a metadata model and language for representing information about resources in WWW. In this paper we introduce Multidimensional RDF (or MRDF), as an extension of RDF, suitable for representing context-dependent RDF data. In MRDF we have a set of dimensions whose values define different contexts (or worlds) under which different parts of an RDF graph may hold. We d...

Real scale Semantic Web applications such as Knowledge Portals and E Marketplaces require the management of voluminous repositories of resource metadata The Resource Description Framework RDF enables the creation and exchange of metadata as any other Web data Although large volumes of RDF descriptions are already appearing su ciently expressive declarative query languages for RDF are still miss...