This picture shows the interface for building string templates. And in particular, it shows the string segments on the right that belong to the "Cusip/Bloomberg" string template.
     A string is built from parts called segments. PatternStream provides many segment types other than variables and constants, such as graphics, markers, cross-references, and more. A condition can be applied to any segment. In the example above, a condition is in place so that "Class A [tab]" only gets published if Class_ID=1.