This screenshot shows the Oracle JDeveloper data mapper tool, which is used to map from one XML schema to another.

The data mapper tab is divided into three columns. The first column contains the source elements (labeled Source:), the second column shows the mapping links between source and target elements (unlabeled), and the third column contains target elements (labeled Target:). In this sample, the first column lists the elements in the CommonCustomer.xsd file and the third column lists the elements in the CustomerDB.xsd file. The image shows elements in the first column joined to columns in the third column to indicate the mapping between source and target elements in the XSD files specified in the column names.