This image shows the singleString_To_process.xsl tab in Oracle JDeveloper. This tab is divided into three columns. The first column contains is labeled "Source: MediatorRef.wsdl", the second column is unlabeled, and the third column is labeled "XSLT File: ServerBPELProcess.wsdl." The first column lists the elements in the MediatorRef.wsdl file and the third column lists the elements in the ServerBPELProcess.wsdl file. The middle column is empty.