The keyword information defines the associated parameters on a JCL statement. The length of this section of the text string is variable depending on the number of parameters and subparameters. Each keyword (such as DSNAME or UNIT) has a one-byte hexadecimal key associated with it. These key values can be referenced with the mapping macro IEFVKEYS (data area ITK). For each of these keywords in the JCL statement, the following information (in this "key entry" format) is included in the text string:

Number of Parameters

1-byte hex key specifying the number of parameters.

Length

1-byte hex number specifying the length of the parameter. The high order bit is always off.

Parameter

Variable length string containing the value of the specified parameter.

Number of Subparameters

1-byte hex number specifying the number of subparameters. The high order bit is always on.

Length

1-byte hex number specifying the length of the subparameter. The high order bit is always off.

Subparameter

Variable length string containing the value of the specified subparameter.