From the Oracle BI Administration Tool documentation:In this release, you can designate child presentation tables using the Child Presentation Tables tab in the Presentation Table dialog to give the appearance of nested folders in Answers and BI Composer. However, in previous releases, repository developers could achieve one level of nesting in Answers by adding a hyphen at the beginning of a presentation table name, or by adding an arrow (->) at the beginning of a presentation table description. If you used these methods to achieve nesting, it is recommended that you run the Upgrade Presentation Foldering utility to convert your metadata to the new structure.
Note:Achieving nesting by adding hyphens at the beginning of presentation table names or adding arrows at the beginning of presentation table descriptions is deprecated for this release and will be removed in a future release.
Open your repository in the Administration Tool in offline mode.
Note: Do not run the Upgrade Presentation Foldering utility in online mode.
Select Tools, then select Utilities.
Select Upgrade Presentation Foldering and click Execute.
The hyphens and arrows disappear from presentation table names and descriptions, and the affected tables are listed as child tables for the appropriate parent object.