An administrator or business user must manually add user segments to Workbench that correspond to the sites and site groups that are defined in Site Administration before they can be referred to in triggering rules. When adding the new Workbench user segments, business users must use the correct syntax. Site and site group IDs are unique within a type but can, in theory, collide across types. Because these names are passed as a single list to Workbench, a prefix scheme is used to ensure a unique identifier for each site and site group that is passed. For more details on these prefixes, see the next section, Constructing the Segment List.
