Origins of drill down processing
Most sentences have a subject and a predicate. And those types of words are regularly identified and used in the processing of textual ETL. Fig 12.4 shows some statements of sentiment and some predicates.
Predicates are normally part of a taxonomy. Fig 12.5 shows a taxonomy.
The taxonomy seen in Fig 12.5 is an n level taxonomy. The hierarchical structure seen in the taxonomy contains the predicate. The predicate then can find its place in a larger hierarchy.
There are implications of this relationship between a predicate and its participation in a taxonomical hierarchy that are not obvious. Consider the analytical visualization drill down process shown on Fig 12.6.
In Fig 12.6, the analysis starts with looking at the negative comments for a topic. The elements of that topic are displayed. Then the comments that relate to each of the elements are displayed. As an example of the drill down just described, the analysis begins with...
