Semantic Web technologies have reached a status where they influence our daily lives. On the one hand, applications for sharing semantically annotated pictures, blogs, and videos and semantic-enhanced social networking platforms are present. On the other hand, the so-called Web of Data with its thousands of billions of triples is leaving its research prototype status. Applications using Semantic Web technologies start to arise and to be used by a large number of users. However, although trust and privacy play a crucial role in its final development and adoption, in most of the running systems and research prototypes no or not sufficient solutions to address these topics are considered. The Semantic Web as well as the Social Web has reached a state where those issues have to be addressed seriously in order to become reality. As the Semantic Web goes mainstream, especially through its Social aspect, it is time for the community to gather around that topic.

SPOT09 is an ESWC 2009 workshop and will bring together, among others, researchers and developers from the field of Semantic Web, the Social Web, and trust and privacy enforcement. It provides the opportunity to discuss and analyze important requirements and open research issues for a trustful Semantic Web. We welcome both, theoretical and application oriented results, concerning how trust can be ensured in an open system like the Social Semantic Web as well as how Semantic Web technologies can be used or have to be extended in order to serve for privacy issues. We also plan to include a specific time slot for case studies and system demonstrations.
Topics

Workshop topics include, but are not limited to:

1. Trust and Privacy on the Semantic Web, including
* Ontologies for trust and privacy
* Data provenance and trustworthiness of knowledge sources
* Semantic web policies
* Privacy by generalization of answers
* Usage control and accountability
* Trust-enabled linked data
* Policy representation and reasoning
2. Trust and Privacy for Social Semantic Web Applications, including
* Trust and privacy in social online communities (e.g., SIOC)
* Privacy in Semantic Web sharing applications (e.g., semantic desktop)
* User profiling and modeling vs. privacy
* Privacy and community mining
* Trust and reputation metrics
* Usage mining and policy extraction
* Privacy awareness in social communities
* The Semantic Web as a trust enabler
3. Applications and Case Studies
* Social Semantic Web case studies, prototypes, and experiences
* Trust and privacy on social semantic platforms
* Social network annoyance, social software fatigue, social spam
* Managing information overload in the Social Web with privacy metrics
* Trust and privacy for social software on mobile devices
* Scalability of trust and privacy on the Semantic Web

Organizing committee

* Michael Hausenblas, DERI Galway, Ireland
* Philipp Kärger, L3S Research Center and Leibniz University Hannover, Germany
* Daniel Olmedilla, Telefonica R&D, Madrid, Spain
* Alexandre Passant, DERI Galway, Ireland
* Axel Polleres, DERI Galway, Ireland

Submission

The following types of contributions are welcomed:

* Research Papers: short (up to 6 pages) and full (up to 12 pages) technical papers;
* Demos and Applications: 2 pages + demo;
* Lightning Talks: 1 slide and 3 min

Papers will have to be formatted using the Springer Publications format for Lecture Notes in Computer Science (LNCS). Submissions for the Research Papers and Demos and Applications will be made using the EasyChair Conference System, and proceedings of the papers will be provided through the CEUR online service.