Abstract includes the iSeries Explorer because there was no efficient way in System i Navigator to obtain a real-time list of system libraries and objects. The alternative—to go into the IFS and get the list by opening QSYS.LIB—is very slow. With the iSeries Explorer, you can bring up libraries that are not loaded in the cross-reference and interact with them.
A good example is the File Analysis function. You can use this function with any file, whether or not the file is loaded in the cross-reference. The iSeries Explorer is also a handy way of loading libraries into the cross-reference. In WDSc, the Remote Systems Explorer eliminates the need for the iSeries Explorer node.