It may be that, due to the mapping, the points of interest are scattered across the Q-space, and thereafter undetectable to the user. There is a great need to extend the mappings interface for Q-PIT to try to overcome some of the problems outlined in the previous section. Firstly, we can look at the very simple textual notation that we currently use to specify the mappings. This would allow the selection of areas of the Q-Space for further investigation. As you grow nearer, more detail presents itself.
Most data models have provision for relationships between entities.
These are commonly modelled as simple lines drawn between objects. If we added such lines to a Q-PIT visualisation, this might make one hell of a mess. I'd like to address is containment. Not so easy to achieve in the relational model, the object model certainly supports the concept of container objects. They can be used to store the results of a query, or indeed of a user-built collection.