In this paper a high performance storage system for RDF documents is introduced. The system employs optimized index structures for RDF data and efficient RDF query evaluation. The index scheme consists of 3 types of indices. Triple index manages basic RDF triples by dividing original RDF graph into several sub-graphs. Path index manages frequent RDF path patterns for long path query performance...

A programming language is described which is built within RDF. Its code, functions, and classes are formalized as RDF resources. Programs may be expressed directly using standard RDF syntax, or via a conventional JavaScript–based syntax. RDF constitutes not only the means of expression, but also the subject matter of programs: the native objects and classes of the language are RDF resources and...

Mukkai Krishnamoorthy Rensselaer Polytechnic Institute Department of Computer Science email [email protected] ABSTRACT The RDF Graph Modeling Language (RGML) is a W3C RDF vocabulary to describe graph structures, including semantic information associated with a graph. Viewing general graphs as Web resources, RGML defines graph, node, and edge as RDF classes and attributes of graphs (such as lab...

Abstract Databases are perhaps the most attacked and vulnerable elements in online environment as far organizations concerned. The databases contain important information of an organization its confidential data, along with those customers. However, little effort dedicated to security is intended protect data. present paper draws attention need implement a simple then complex database using RDF...

The details of reasoning in RDF [2] and RDFS [1] are generally well known. There is a model-theoretic semantics for RDF [3, 4] and there are sound and complete proof theories for RDF without datatypes [6]. However, the model-theoretic characteristics of RDF have been less studied, particularly when datatypes are added. We show that RDF reasoning can be performed by only considering finite model...