The ISWC 2013 Posters and Demonstrations Track complements the Research and In-Use tracks of the conference and offers an opportunity for presenting late-breaking research results, ongoing research projects, and speculative or innovative work in progress. The informal setting of the Posters and Demonstrations Track encourages presenters and participants to engage in discussions about the presented work. Such discussions can be invaluable inputs for the future work of the presenters, while offering participants an effective way to broaden their knowledge of the emerging research trends and to network with other researchers.

These proceedings represent the collection of abstracts corresponding to the posters and demos presented at ISWC 2013. Technical posters report on work in progress or completed Semantic Web software systems, while demonstrations showcase innovative Semantic Web related implementations and technologies. In total, there were 104 submissions, of which we accepted 45 demonstrations and 27 posters. We thank the authors of all submissions for their contribution to the program of ISWC 2013.

Furthermore, we would like to thank all the members of the program committee, as well as the additional reviewers who have spent their valuable time within a very tight schedule in prime holiday time to make this program reality. We are grateful to all of these dedicated people for their valuable discussions and feedback, and we wholeheartedly appreciate their voluntary and enthusiastic cooperation. They supported us in creating a balanced mix of posters and demos that address diverse Semantic Web aspects and which will result in an exciting session at the conference. Lastly, we want to thank our fellow organizers of ISWC, foremost the general chair, Chris Welty, and Kerry Taylor for the local organization.