Data Analysis is part of Data Profiling module in DvSum. Data Analysis helps identify consistency / dependency of data across multiple fields. e.g. between business unit, product family, product line, which combinations exist and how many records.
The system automatically makes those determinations by reading the statistics of the data. And it does it only for fields it considers as attributes. So for example if a table has 100,000 rows and there are 100,000 unique item ids, then that field will not show up in Data Analysis. On the other hand, if there is product family, for which there are 100 unique values, then those will show up in the analysis.
For this reason, you only see limited values in the data analysis section.