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In this paper we give details about the role of ontologies in Semantic Web and tools required for constructing Semantic Web applications. The Protégé tool for ontology development and knowledge acquisition can be adapted for editing models in different Semantic Web languages. In recent experiments to prototype the Semantic Web, members of different communities with different backgrounds have created...
Data provenance has been an active area of research as a means to standardize how the origin of data, process event history, and what or who was responsible for influencing results is explained. The common trend in capturing provenance is to collect all possible information, and then attempt to extract relevant information from the entire collection, which is not efficient especially at runtime. Unless...
Having dataset in relational database published and accessed on the Web of Data is a hot issue. I n t his p aper, w e present implementation of publishing relational database as Linked Data with two open-source platforms, particularly D2RQ and Ontop. Both platforms provide their own way to translate databases into RDF Graphs. However, in case of querying data, Ontop shows much better performance than...
Inspired by the shift of vocabulary development projects towards repository hosting services such as GitHub, we noticed the lack of ontology-aware editors that can be easily connected to these repositories. This motivated us to build a web client optimized for the communication with external repositories and including specific functionalities to ease the participation in collaborative ontology development...
Cross-domain resource and infrastructure federation has gained more and more attention in the fields of Cloud and Future Internet (FI) testbeds. But, interoperable monitoring data exchange across heterogeneous domains remains a challenge due to the variety and heterogeneity of the used tools and interfaces. Many efforts have been made to define common data models and protocols but are task or domain...
Ontology is one of semantic web implementation and knowledge representation that can be implemented and consumed by any kind of application. Therefore, it will face the interoperability issue, as there are lots of application platform nowadays, and developers can't restrict usage of ontology only in the application with same platform. As ontology is part of semantic web, the most suitable method to...
Knowledge is integral to an intelligent system. However, constructing a knowledge base often involves great cost and substantial effort on the part of human experts in the target domain. In this paper, we present an approach that harnesses the power of casual users to construct the knowledge base. The users answer a simple series of questions and, by aggregating their answers, we obtain the information...
This paper describes the development of a multiple ontology workspace management system and its performance assessment. This management system provides users with their own ontology workspace as a repository. It aims to facilitate the storage and manipulation of ontology models for knowledge driven manufacturing execution systems. The system uses Jena TDB API to maintain the file system on the server...
An integral part of a system that manages medical data is the persistent storage engine. For almost twenty five years Relational Database Management Systems(RDBMS) were considered the obvious decision, yet today new technologies have emerged that require our attention as possible alternatives. Triplestores store information in terms of RDF triples without necessarily binding to a specific predefined...
In this paper, we combine and customize Friend of A Friend (FOAF) and music ontology for music concerts recommendation system on Facebook application to enable users retrieving filtered information of music concerts from different sources. The information is filtered based on user's musical taste defined on his Facebook profile. In this research, ARC2 is used as semantic web based PHP framework for...
Currently, data integration in Ubiquitous Information Systems (UISs) is achieved by a centralized relational database where all the information coming from the remote servers is stored. To improve such architecture we proposed to convert in each server the relational archives into an RDF triple stores where data are represented by standard terms interrelated by subject-predicate-object relations (also...
Cloud Computing is a new computing paradigm where a large amount of computing capacity is offered on demand and only paying for what you use. Several Infrastructure Providers have adopted this approach offering resources which are easily managed by means of web-based APIs. However, if a user wants to use different providers, the resource management becomes tedious because providers define different...
In this paper we introduce Linked Data driven development, a lightweight methodology for using Linked Data throughout the software life cycle. We explain the idea of Linked Data and how it plays an important role in the semantic web. Furthermore, we describe the necessary steps and approaches when using Linked Data for improving the software development process and give a discussion on the bonuses...
The need for annotating the continuously increasing volume of medical image data is recognized from medical experts for a variety of purposes, regardless if this is medical practice, research or education. The rich information content latent in medical images can be made explicit and formal with the use of well-defined ontologies. Evolution of the Semantic Web now offers a unique opportunity of a...
Social Networks have recently experienced a significant increase in popularity and are now an integral part of millions of people's daily lives. Through these Social Networks, users create profiles, build relationships, and join groups forming intermingled sets and communities. There is a wealth of information within Social Networks, which if exploited properly and combined with rules and policies,...
Using smart grids to build low carbon networks is one of the most challenging topics in ICT (Information and Communication Technologies) industry. One of the first worldwide initiatives is the GreenStar Network, completely powered by renewable energy sources such as solar, wind and hydroelectricity across Canada. Smart grid techniques are deployed to migrate data centers among network nodes according...
With increasing student mobility and boom of the international student exchange programmes, a need arises for unifying and presenting information about academic study programmes on the Web. Publishing study programmes using semantic web technologies enables students to easily search and select study topic of their interest. In this paper, we discuss the way to transform data from production-grade...
In recent years, some strategies for distributed information sharing among multi-agents have been proposed, and a system relevant to each strategy had been constructed. However, most of them depend upon a centralized architecture. This paper presents an approach for distributed information sharing based on ontology context immigration (OCI) and a distributed information sharing system (DISS) constructed...
Nowadays mainstream RDF Repository Systems are based on RDBMS. The SPARQL query engine translates a SPARQL query into a SQL one, and then the RDBMS executes the SQL query. However the RDBMS optimizers, which usually assume that columns are statistically independent, often underestimate the selectivity of conjunctive predicates and choose a bad query execution plan. It is important for query optimizers...
The amount of semantic data on the Web has increased exponentially in the last years. One of the main reasons for this is the use of RDB2RDF systems, which generate RDF data from relational databases. Most of the work on these systems has focused on increasing the expressivity of query languages, analyzing their coverage over databases and generating sound, complete and efficient query plans. However,...
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