You want to add this capability to a Knowledge Script when:
You have changed the legend format of an existing Knowledge Script.
You have created a new Knowledge Script with a unique legend format.
Analysis Center can process dynamic legend data without having to rely on a legend-processing rule for each data stream collected by a Knowledge Script.
To see an example of how dynamic legends are used in an existing Knowledge Script, examine the code for the AppManager version 6.0 of NT_LogicalDiskSpace.