Stop Moving Files: How to Map Multiple Folders to a Single SAS Library

This SAS^© feature allows logically grouping multiple SAS^© libraries under a single libref. Concatenation can include a combination of already assigned librefs and physical paths. Libraries are searched in the order of their declaration for read or update operations. The creation of new datasets always occurs in the first listed library. The attributes of the first library determine those of the concatenated set. Rules include that options and engines apply only to libraries specified by a physical path, the non-assignment of a libref modification to the concatenation, the concatenation of catalogs, sequential processing if a library is sequential, and considering the first occurrence of a file for operations and display.