A SelectMessage job consists of only two jobsteps: The MessageSelector loads messages from the message basket depending on the result, the function entered under Expression. All messages to which the function applies (CompareDateTime = 2007-01-29T17: 50: 00 → true) are selected from the incoming message basket (Inbox, SelectionBase / InputMessages). These messages / entities are forwarded by the delegator job to the next job, which is entered in the properties of the delegator job, for further processing.
Various selections for the expression are documented in the help text for the MessageSelector.