Recommender service systems have been widely and successfully applied in e-commerce to provide personalized recommendations to customers nowadays. The tremendous growth in the amount of available information and the number of visitors to websites poses some challenges for recommender service systems such as poor prediction accuracy, scalability, and dynamic changes of users. To address these is...

The Semantic Web promises to provide new applications for Internet users through the use of RDF metadata attached to various information resources on the web. Yet is somewhat unclear who will provide the metadata, or what will motivate people to provide it, let alone the exact nature of the applications the Semantic Web will ultimately support. What will the “killer app” of the Semantic Web be,...

An issue that is equally arising both from social networks and the Semantic Web is the fact that, without the consistent use of the same identifier for an object across systems, it is unnecessarily hard to perform information integration. We are addressing this issue where both fields intersect, namely in the context of FOAF profiles, which describe the social network of a person with Semantic ...

Portals providing the modeling of social relations among people became more and more popular. Although the existing FOAF (Friend of the Friend) ontology developed for modeling such social relations was introduced and enjoyed popularity, it is not used in such extent that it can be considered as World Wide Social Network. Such network can bring benefits (e.g., by providing useful analysis) only ...

Recently, social networks have attracted a particular interest in the web, particularly Facebook. Consequently, a large amount of social data is produced. For semantic modeling of such data, several social network ontologies are introduced. The most popular is FoaF (Friend of a Friend) ontology. In our research, we are interested in data generated from Facebook social network. Heretofore, the s...

In this paper, UniGrad, an ontology that extends FOAF (Friend Of A Friend) with graduate education and research concepts has been presented. Nowadays, having lots of information exist throughout the Web, e.g. for academicians and researchers, finding a specialist in an area as a query is somehow cumbersome. The proposed technique is using Semantic Web technology including ontologies such as FOA...

A number of researches have been focused on improving the productivity of knowledge workers. Effective communication is determinative, and one important problem has been to find the right person for collaboration. The Semantic Web efforts improve it by better wide-range knowledge management. Through extending the FoaF (Friend of a Friend) vocabulary, knowledge workers can share their machine-re...

Data portability has become an important requirement on the Social Web. This paper describes how data and social network portability can be achieved by building upon existing Semantic Web developments such as SIOC and FOAF. The SIOC project provides a common format for expressing user-generated content in a machine-readable form and tools for import/export of this information, while the FOAF vo...

The Semantic Web promised to enable a new generation of intelligent applications by providing programs and software agents with rich and effective ways to share information and knowledge. The Semantic Web allows people and groups to define sharable ontologies – collections of classes, properties and objects – with well defined and unambiguous meaning. These ontologies permits computer programs ...