The Web Service Definition tab appears for web service source or target definitions that are manually defined or are based on relational or flat file sources or targets. You can add or delete columns in the source or target definition. You can change the names and datatypes of the columns and modify the precision and scale for specific datatypes. You can also specify whether the columns occurs once or multiple times.

When you make changes to the columns in the Web Service Definition tab, the changes are reflected in the Columns tab.