System variables substitution in parameter library members
Some MainView AutoOPERATOR BBPARM members support system variables substitution. (Refer to Table 1 for a brief description of each BBPARM member.) With symbolic substitution, you can reduce the number of parameter libraries that you maintain. When the member is read, the value of the symbol is substituted for the symbol. The symbol must begin with an ampersand, followed by one to eight characters, and can optionally end with a period. You can define your own symbols by placing them in the IBM PARMLIB member IEASYMxx.
Symbolic names can be concatenated as a string, and names can be added at the beginning, middle or end of the string. See the following example:
&SYSNAME=SJSD, the preceding string converts to
A period at the end of a symbolic name is assumed to be a delimiter and is omitted in the conversion. If you want to generate the string
BMC1SJSD, you would code
For more information about symbolic substitution, refer to 'System Symbols and Symbolic Substitution' in the IBM Initialization and Tuning Reference.
You can control substitution on a member-by-member basis by adding a control card (a PROCESS statement) at the beginning of each member. The PROCESS statement is described in Table 1.
Table 1. PROCESS statement
indicates whether system variables substitution is allowed
When present, the PROCESS statement must be the first statement in the member and must begin in column 1. Possible keywords are as follows
Only the first character (Y or N) needs be specified.
Substitution is not performed on comments or any data beyond column 71.
You can use the Dynamic Parameter Manager (DPM) to display and alter specific parameters in members AAOEXPxx, AAOALSxx, AAOARPxx, and AAOTSPxx. For more information about DPM, see Continuous operation with the Dynamic Parameter Manager.