On return from RETRIEVE processing, the keyword list (SJRELIST) contains paired fields, each pair consisting of a JCL keyword and a pointer to the text unit pointer list for that keyword.
The application-provided storage area contains the text unit pointers list and the individual text units associated with each keyword.
The text units associated with a particular keyword can contain one or more keys. If the application does not specify data corresponding to a particular key, that key might not be returned or a key might be returned with a parameter count of zero. The application must interpret each returned key to determine whether it contains zero or some other parameter count value.