In the SAS BI-ogsource, Angela posts some sample SAS code for updating library definitions using the METALIB procedure.

SAS Enterprise Guide users can make use of a friendlier interface to do the same job. Now available for download, the Update Library Metadata task plugs right into SAS Enterprise Guide and lets you point-and-click your way through the process.

If you are on the opposite end of the spectrum, and you want to know all of the gory details about metadata-based libraries and how to make use of them within SAS BI applications, then I invite you to sit down with a nice cup of tea and read this technical document.