ns-serif'">Semantic technologies can help to categorize the existing knowledge, thereby allowing simple unified navigation for all users even to remote knowledge. Unlike general purpose web applications, manually created, topic specific ontologies may often be appropriate. However, a reliable, automatic classification of objects into these categories may be desirable.</span><span style="font-size: 12pt; color: blue; font-family: 'Times New Roman','serif'"><o:p></o:p></span><span style="font-size: 12pt; colo