See the Javadocs in <EPM_ORACLE_HOME>/common/docs/ReportingAnalysis/SDK/javadoc.
This interface defines methods common to printer and output directory resources in EPM Workspace. Two physical resource artifacts types are extended from the PhysicalResource interface:
Physical resource artifacts are created using methods in the Repository interface. They are addPrinterResource() and addOutputDirectory() for importing a printer and an output directory, respectively. Two OutputDirPhysicalResource artifact types can be created: simple output directory and an FTP output directory. PrinterPhysicalResource and OutputDirPhysicalResource define methods to modify physical resource artifact properties.