The file name and list of data sets are recorded. Subsequent applications that reference the same INPUT file name are invoked only when their list of concatenated data sets is an exact match of the initial application. When the last application using that INPUT library terminates, the library is deallocated.

When the library type is INPUT, and the data set information does not match, the second application is not invoked. An error message appears indicating that the requested function cannot be invoked because the required file is in use.