You use the Export Alias Table dialog box to export alias tables from databases to ASCII source files. Thus, you create and store table copies, to be used for back up or to be imported, at a later time, into other databases.
In the Alias table box, you select an alias table. When you click OK, the Save As dialog box is displayed. In the Save As dialog box, you specify the export file name (with an .alt extension) and the location to which to save the table (within the Essbase structure or elsewhere within the file system).
“Setting Aliases” in the Oracle Essbase Database Administrator's Guide
unloadalias (ESSCMD) in the Oracle Essbase Technical Reference
loadalias (ESSCMD) in the Oracle Essbase Technical Reference