In Inst subsystem listings, patches are identified by their patch number and product subsystem name. For example, patchSG0000034.bvo_sw.bvo identifies a patch to a subsystem of the Broadcast Video Option product.
When you install a patch, Inst automatically moves the original files before installing their patch replacements. The original files are copied to a directory that Inst creates specifically to save such files, /var/inst/patchbase. This makes it possible to remove a patch and replace it with the original version of the product files.