Pattern-Based Annotation of HTML-Streams

Web pages containing RDFa markup facilitate a broad range of new agents that improve their usability for human readers. Unfortunately, there still exist only few web sites featuring such annotations. In this paper, we demonstrate Atheris, a system that annotates structured web pages by means of our web data extraction tool ViPER. Atheris runs inside a web proxy service, making it transparently available. Our approach enables the web browser—the mostly used web agent—to operate intelligently on the displayed page by providing a semantic view over previously ’meaningless’ data in order to support human readers.