The text read off it
[02.06.02]
A period (.) must not be used to signal the end of a specification as it will be treated as part of the previous word thus creating an undefined symbol.
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General Function of Specification Types
Card Description FILE cards The FILE environment card must be included to describe the file characteristics which affect compilation, such as use for input or output and the type of blocking utilized. SPECIF cards The SPECIF card describes such file characteristics as symbolic input/output unit assignments, density, relative activity, labeling conventions and other programmer choices which are to be punched during compilation into load-time control cards. SPECIF cards may be omitted if the programmer prefers to provide his own cards containing the appropriate information at load-time. POOL cards POOL environment cards may be used by the programmer to direct the processor in the allocation of buffer storage for several files. In the absence of POOL cards, the processor will automatically make pool and buffer assignments. GROUP cards GROUP cards may be used by the programmer to specify buffer allocation for files belonging to a particular buffer POOL. CONTRL cards If several separately compiled programs are to be combined and executed as one program, any joint procedure or data description areas must be defined for the compiler by CONTRL environment cards. OPTION cards OPTION cards are used when the programmer wants the processor to depart from its standard use of 709/7090 collating sequence, or when he wishes special emphasis placed on minimizing either storage or running time requirements in his object program. COND cards The COND card names and defines a computer console key setting which the programmer may want to test by procedure statements in his program.
C. FILE Environment Card
FILE cards are used to supply the compiler with the characteristics of the file which are necessary at compile time. This specification must be made for each file processed by the program. The formats of the FILE cards and options available for input, output and checkpoint files are shown below: