I'm trying to understand publishing packages (in my case using a stored process), and I'm looking at this example from the documentation: https://documentation.sas.com/?docsetId=publishdg&docsetTarget=n1xvf6fybwq7pvn1j8qt77ech1xz.htm&docsetVersion=9.4&locale=en   In particular, they define two packages. One is the main package: packageId = 0;    nameValue="type=(test) coverage=(filtering, transports)";    CALL PACKAGE_BEGIN(packageId,"Main results package.",       nameValue, rc);   And one is a secondary package that gets nested in the first later on: gifpid=0;    CALL PACKAGE_BEGIN(gifpid,"Gif nested package.",'', rc);   Both of these packages have a package ID of 0. How can that work? Isn't the packageID supposed to uniquely identify a package? ... View more