Conceptual Graphs and Annotated Semantic Web Pages

Semantic Web aims at turning Internet into a machine understandable resource, which requires the existence of ontologies, methods for ontology mapping and pages annotated with semantic markup. It is clear that the manual annotation of pages is not feasible and the fully automatic one is impossible so the current trend is creation of tools for semi-automatic page annotation. Platforms like KIM and SemTag automatically annotate pages with named entities and predefined relations but deeper annotation requires human intervention. In this paper we describe a prototype that visualizes annotations of web pages and assists the user in their verification and enrichment. The ordinary people don't know terms like ontology and OWL/RDF but they can easily understand visualization of ontology terms as a hierarchy and the respective assertions as conceptual graphs. Visualization of knowledge is always an important issue and tools that make this process more intuitive contribute to better semantic annotation and domain understanding.