We all know that SAS has two kinds of library: permanent library and temporary WORK library. However, do you know that there are still two special permanent libraries?
USER:
When it exists, all datasets reference with a one level name will be written to the the permanent USER library instead of the temporary WORK library.
For the convenience of debugging, I suggest we can miss "WORK." when reference dataset.
Note: system option USER has the same effect.
LIBRARY:
In FMTSEARCH, there are ALWAYS two implicit format catalogs: WORK.FORMATS and LIBRARY.FORMATS. If they do not appear in FMTSEARCH= list, they will be searched at first.
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