/VALID=(val1,val2...)

   Getinput can compare the user input to valid possibilities specified
   with /VALID.

   Options are:

   /VALID=(str1,str2,str3)       As user input only the valid
                                 strings are accepted. When the
                                 user input is unique, only the
                                 unique part is needed, see examples.
   /VALID=(2,4,6)                As user input only the strings
                                 2, 4 and 6 are accepted.
   /VALID=(1,10)                 As user input only the strings
                                 1 and 10 are accepted.
   /VALID=(1,10)/TYPE=INTEGER    As user input an integer from
                                 1 to 10 is accepted.
   /VALID=(1,10)/TYPE=INT/NORANG As user input the integers 1 and 10
                                 are accepted.

1  –  Examples

   $ GETINPUT OutputSymbol /VALID=(yes,no)/PROMPT="Continue"
   Continue: JA
   %GIP-W-INPERR, input has to be in the VALID list
   Continue: ?
   %GIP-I-HELP, the input must be chosen from the following list: YES,NO
   Continue: y
   $ show symbol OutputSymbol
     OUTPUTSYMBOL = "YES"

   $ GETINPUT OutputSymbol /VALID=(1,5)/TYPE=INT/PROMPT="Kies een optie"
   Kies een optie: 0
   %GIP-W-INPERR, input has to be in the VALID list
   Kies een optie: yes
   %GIP-W-INPERR, input has to be numeric
   Kies een optie: ?
   %GIP-I-HELP, the input must be an integer value from 1 to 5
   Kies een optie: 5
   $ show symbol OutputSymbol
     OUTPUTSYMBOL = "5"