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SAS Certification Prep Guide, 4th Edition by SAS Institute

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Documenting and Maintaining Indexes

Overview

Indexes are stored in the same SAS library as the data set that they index, but in a separate SAS file from the data set. Index files have a member type of INDEX. There is only one index file per data set; all indexes for a data set are stored together in a single file.
The following figure shows the relationship of SAS data set files and SAS index files in a Windows operating environment. Notice that the index files have the same name as the data set with which they are associated, but they have different file extensions. Also, notice that each index file can contain one or more indexes, and that different index files can contain indexes with identical names.
Note: Index files are stored in the ...

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