DATA step processing has two distinct phases: the compilation phase and the execution
phase. The compilation phase checks for syntax of the SAS statements and then
compiles them, creating the input buffer, program data vector, and descriptor
information.
The execution phase is executed once for each input observation that is being processed.
The execution phase is further broken down into three categories: the initialization, the
observation loop, and the termination processing. These three phases are particularly
important to the Report Writing Interface.
When writing a custom report, you often have a heading section at the ...
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