CSI supports qualified data-names. When you query an item, you can specify A OF B as opposed to A OF C. If CSI is unable to uniquely resolve the data-name that you specify, it provides a list of synonyms of the item.
For example, if you have the following data declaration:
01 B. 03 A PIC X. 01 C. 03 A PIC X.
and query the name "A", CSI reports that "A" is an ambiguous name and displays the synonyms A of B and A of C.