We describe a simple protocol for RESTful authentication, using widely deployed technologies such as HTTP, SSL/TLS and Semantic Web vocabularies. This protocol can be used for one-click sign-on to web sites using existing browsers — requiring the user to enter neither an identifier nor a password. Upon this, distributed, open yet secure social networks and applications can be built. After summa...

In this paper, an attempt is made to conceptually unite three different application areas for semantic technologies, namely personal Knowledge Management, social networking, and Peer-to-Peer information-sharing. Until now, semantic technology has been applied to each of these application areas separately or in binary combinations only. By functionally combining all three areas in a single appli...

We present LENA, a web-based RDF browser that supports the rendering of complex RDF data, including interlinked data available on the Semantic Web, based on criteria expressed as SPARQL queries. The user interface of LENA enables to switch between different views onto the presented data enabling users to browse with respect to individual interests or expertise.

In this paper we take a view from the bottom to RDF(S) reasoning. We discuss some issues and requirements on reasoning towards effectively building Semantic Web Pipes, aggregating and patching RDF data from various distributed sources. Even if we leave out complex description logics reasoning and restrict ourselves to the RDF world, it turns out that some problems, in particular how to deal wit...

Listing references to scientific publications on personal or group homepages is a common practice. Doing this in a consistent and structured manner either requires a lot of discipline or a centralized database. Scientific publication, however, is a distributed activity by nature. We present a completely distributed and RDF-based implementation for disseminating references to scientific publicat...

Finding people is essential in finding information. Librarians and information scientists have studied authority control psychologists and sociologists social networks. In aforementioned, authors link to documents (and co-authors) creating access points to information. In latter, social paths serve as channels for rumours as well as expertise. Key problems include identification and disambiguat...

The most popular collaborative filtering implementations require either a critical mass of referenced resources or a lot of active users. Other solutions are based on finding a referral with an expertise on the given domain of discourse. In this article we present the social semantic collaborative filtering solution to information retrieval. We describe how the concept of users' managed collect...

In this paper we present an approach for interlinking and RDFising social e-Learning Web 2.0 platforms like ELGG based on semantic tagging and Linked Data principles. A special module called SID (Semantically Interlinked Data) was developed to allow existing tagged and published user generated content an easy entrance into the Web of Data and to enrich it semantically on the other hand. Our app...

This paper evaluates linking ENUM with the Semantic Web. ENUM is a protocol for mapping a telephone number to a Uniform Resource Identifier (URI) which can be used to contact a resource associated with that number. ENUM therefore gives access to a wide range of a person’s (communication) identifiers by looking up a specific domain associated with that person’s telephone number. After describing...

When using the Web, one begins to understand and acknowledge the existence of the “other side of the mirror”. The Internet has become a means of inter-relationship between its users, usually forming complex and emergent relationships, providing a handful of knowledge waiting to be extracted. In this paper, we present a tool that analyzes the Flickr community using semantic web technologies. It ...