[Koha] On import frameworks

Hi, Koha-users ! 1) Does "import the framework" mean "to copy" or "to move" it ? 2) What does it mean the word "another" in the proposition: "An easy way to create a new framework is to import it from another Koha database" ? Is it a database from other Koha installation ? Or, maybe, it is a database from current Koha installation ? 3) Where can I know from what file is a "Spreadsheet file" in the dialog box "Import"? (In every case see: Koha 3.14 Manual (en) > 2. Administration > 4.1.5.2. Export Framework.) Regards, Gennady