There's a large learning curve to doing this if you haven't played with SAS metadata before. You will need to become familiar with the DATA step metadata functions. then learn how to navigate the metadata object model. I find it easiest to use the metadata browser (METABROWSE) that is available in the SAS Windowing Environment. Please note that writing to the SAS metadata repository is risky and can easily end up corrupting it. You could investigate the Active Directory metadata synching process to gain a better understanding of updating.
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