| CorrelationFilter | Represents a correlation filter expression. | 
| FalseFilter | Represents a special kind of filter that doesn't match any message. | 
| Filter | Represents a filter expression that is evaluated against a message on a topic. | 
| RuleAction | Represents an action that transforms a message matched by a filter. | 
| RuleDescription | Representation of a rule defined on service bus topics. | 
| SqlFilter | Represents a SQL language-based filter expression that is evaluated against a message. | 
| SqlRuleAction | Represents a SQL language-based transformation expression that is performed against a message. | 
| TrueFilter | Represents a special kind of filter that matches every message. |