SIOC: Semantically-Interlinked Online Communities HY-566 Theodoros Dionysiou 1616 Nicolaou Stavros 1686 Andreas Pobatzis 1851

What is Semantic Web? Web of data precise, structured information on: Objects on the web and in the real world Relations between them Resource Description Framework (RDF) triples in the form of (subject, predicate, object) graph with objects (nodes) and relations between them Easy Integration of Data Data of different nature (FOAF, SKOS, RSS, …) SIOC – model of data – for social media sites

Online communities Online community sites: Provide a valuable source of information May contain rich meta-information Many sites discussing complementary topics But are isolated from one another: They are like islands without connecting bridges

SIOC SIOC provides methods for interconnecting discussion methods such as blogs forums mailing lists Wikis Add more value Let other sites know more about the structure and contents Make more use of tagging and semantic metadata

SIOC Overview

The Main Concepts in SIOC

SIOC classes and properties

Example : a blog entry Post titled "Creating connections between discussion clouds with SIOC" created at 09:33:30 on written by a user "Cloud" on topics "Blogs" and "Semantic Web" with contents described in sioc:content. More information about its author can be found at The post has a reply and detailed SIOC information about this reply can be found at

SIOC tools and applications SIOC Exporters WordPress, b2evolution popular blogging platforms based on PHP/MySQL IRC2RDF SWAML is an exporter for mailing list content in Semantic Web format Talk Digger find, follow and enter conversations of the Web

Demo: Semantic Radar for Firefox Browser extension which inspects web pages for links to Semantic Web metadata and informs about presence of it