While XPath is an established query language developed by the W3C for XML, SPARQL is a new query language developed by the W3C for RDF data. Comparisons between the data models of XML and RDF and between the query languages XPath and SPARQL are missing. Since XML and XPath are earlier recommendations of the W3C than RDF and SPARQL, currently more XML data and XPath queries are used in applicati...

This paper suggests a Resource Description Framework (RDF) model for effective handling of distributed data relating to the Semantic Web. RDF is a data model that integrates aptly structured data. The World Wide Web is facing great challenges in data retrieval as a result of increase and request of knowledge from different sources. This brings the issue of information overload. Therefore, in mi...

This paper discusses current versions of WordNet from a data modelling perspective. We show that these versions do not consider basic data model desiderata for their design, like flexibility, extensibility and interoperability. We claim that a data model for WordNet must also consider the inherent network structure of WordNet data. Thus we make the case for an RDF model for WordNet and present ...

This paper introduces “Wilbur”, an RDF and DAML toolkit implemented in Common Lisp. Wilbur exposes the RDF data model as a frame-based representation system; an object-oriented view of frames is adopted, and RDF data is integrated with the host language by addressing issues of input/output, data structure compatibility, and error signaling. Through seamless integration we have achieved a progra...

RDF provides a basic way to represent data for the Semantic Web. We have been experimenting with the query paradigm for working with RDF data in semantic web applications. Query of RDF data provides a declarative access mechanism that is suitable for application usage and remote access. We describe work on a conceptual model for querying RDF data that refines ideas first presented in at the W3C...

The Resource Description Framework (RDF) is a popular data model for representing linked data sets arising from the web, as well as large scientific data repositories such as UniProt. RDF data intrinsically represents a labeled and directed multi-graph. SPARQL is a query language for RDF that expresses subgraph pattern-finding queries on this implicit multigraph in a SQLlike syntax. SPARQL quer...

RDF aims at being the universal abstract data model for structured data on the Web. While there is effort to convert data in RDF, the vast majority of data available on the Web does not conform to RDF. Indeed, exposing data in RDF, either natively or through wrappers, can be very costly. Furthermore, in the emerging Web of Things, resource constraints of devices prevent from processing RDF grap...

The Resource Description Framework (RDF) Model&Syntax Specification describes a metadata infrastructure which can accommodate classification elements from different vocabularies i.e. schemas. The underlying model consists of a labeled directed acyclic graph which can be linearized into eXtensible Markup Language (XML) transfer syntax for interchange between applications. This paper will demonst...

Abstract. In the past decade, the volume of RDF (Resource Description Framework, which is a standard model for data interchange on the Web) data has grown enormously, and many RDF datasets (e.g., Wikipedia) have reached up to billions of triples. As a result, efficient management of this huge RDF data has become a tremedous challenge. In this paper, we present HTStore, a hash tree based system ...

Digital Replay System (DRS) is an application for replaying and analyzing combinations of video recordings, transcriptions and system log files. The W3C’s Resource Description Framework (RDF) and Web Ontology Language (OWL) are used to define and maintain the application’s internal data model, based on the JENA RDF library. Each application has its own persistent RDF models, provided by a datab...