In order to acquire the concepts related to a professional domain, 4600 web pages are structured into 900 hierarchical clusters by TEMIS. The design of the 3D interface for exploring these classes is described together with a qualitative evaluation by six professionals.The interface is defined through an XML language for virtual world design. Scene graph and behavior is automatically generated from textual data analysis and provides users with a multi-scale controlled browsing of the hierarchical structure. The evaluation shows that users are satisfied with the interface even though some discontinuities in interaction should be avoided.
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