The first access to the database is the highest level VRML file in the hierarchical structure. Moving in this space we can see many objects representing lower level clusters (and then VRML files) positioned in dependence of their associated vector.
So we can see probably zones more populated of objects than others.
The movements can be walk, fly, translate, tilt, yaw, pitch, roll and can be simply performed by keys on the browser or specialized joystick.
When the cursor is on a object the browser shows, in an other frame, the list of words associated with the cluster that is represented by this object: this list of words is written inside the VRML file. Looking at these words we can understand the contents of the cluster and decide if it is interesting for our research: in this case we can click on the object obtaining the download and visualization of the VRML file associated.
This kind of navigation looks more enjoyable than useful and must be enhanced enabling the user to move in this world just as he could find here kind peoples to ask "excuse me, can you indicate me the direction for documents speaking about chemistry?":this is the target of the next chapter.