A user-defined format has been created using the FORMAT procedure.How is it stored?
A. in a SAS catalog
B. in a memory resident lookup table
C. in a SAS dataset in the WORK library
D. in a SAS dataset in a permanent SAS data library
Answer: A
注解：存储自定义FORMAT的文件格式叫作catalog。FORMAT的存储位置和名字可以通过PROC FORMAT statement中的LIBRARY option设定，缩写为LIB，格式为：LIBRARY = lebref.catalog_name。例如：
PROC FORMAT LIBRARY = SASLIB.self_defined_format;
会在SASLIB library中建立名为self_defined_format的catalog。如果不定义libref，默认library为WORK 。如果不定义catalog_name，默认名字为Formats。如果不设置LIBRARY option，FORMAT会存储在WORK library下，文件名为Formats。