| Class Summary | 
| AddMarkerToItem | Scenario action class for adding a marker
 to a repository item | 
| ItemHasMarker | This abstract class can be extended to create
 marker test expressions for any type of repository
 item. | 
| MarkerAction | This abstract class can be extended to
 implement marker actions. | 
| MarkerConfiguration | Configuration class used by scenario marker actions
 and expressions. | 
| MarkerExpressionFilter | This abstract class can be implemented to create a marker
 expression filter. | 
| RemoveAllMarkersFromItem | Scenario action class for removing all the markers
 from a repository item. | 
| RemoveMarkersFromItem | Scenario action class for removing markers
 from a repository item | 
| ValidatedMarkerExpressionGrammar | Scenario Editor grammar extension that dynamically creates
 key/value selections for marker actions and expressions using the
 predefined keys and values. |