Libraries that point to most external data sources, such as Excel, are not going to have the "rename" ability that SAS does use for it's files because you never know what else may be looking for that explicit name and SAS renaming the "table" would break other behaviors.
For example you can reference a cell on a different sheet inside an Excel workbook by using "Some sheet name"!A4 to reference the cell A4 on the sheet with name "Some sheet name". If you were allowed to rename that sheet then the cell reference would break and other parts of the spreadsheet would be unusable.
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