| interface  | BooleanFlag | Event field annotation, specifies that the value is a boolean flag, a trueorfalsevalue | 
| interface  | Category | Event annotation, to associate the event type with a category, in the format
 of a human-readable path. | 
| interface  | ContentType | Meta annotation, specifies that an annotation represents a content type, such
 as a time span or a frequency. | 
| interface  | DataAmount | Event field annotation, specifies that a value represents an amount of data (for example, bytes). | 
| interface  | Description | Annotation that describes an element by using a sentence or two. | 
| interface  | Enabled | Event annotation, determines if an event should be enabled by default. | 
| interface  | Experimental | Annotation that specifies that an element is experimental and may change
 without notice. | 
| interface  | Frequency | Event field annotation, specifies that the value is a frequency, measured in Hz. | 
| interface  | Label | Annotation that sets a human-readable name for an element (for example,
 "Maximum Throughput"). | 
| interface  | MemoryAddress | Event field annotation, specifies that the value is a memory address. | 
| interface  | Name | Annotation that overrides the default name for an element (for example, when
 the default package for an event is not appropriate). | 
| interface  | Percentage | Event field annotation to use on fractions, typically between 0.0and1.0, to specify that the value is a percentage. | 
| interface  | Period | Event annotation, specifies the default setting value for a periodic event. | 
| interface  | Relational | Meta annotation for relational annotations, to be used on an annotation. | 
| class  | SettingControl | Base class to extend to create setting controls. | 
| interface  | StackTrace | Event annotation, determines whether an event by default has a stack trace
 or not. | 
| interface  | Threshold | Event annotation, specifies the default duration below which an event is not
 recorded (for example, "20 ms"). | 
| interface  | Timespan | Event field annotation, specifies that the value is a duration. | 
| interface  | Timestamp | Event field annotation, specifies that the value is a point in time. | 
| interface  | TransitionFrom | Event field annotation, specifies that the event transitioned from a thread. | 
| interface  | TransitionTo | Event field annotation, specifies that the event will soon transition to a thread. | 
| interface  | Unsigned | Event field annotation, specifies that the value is of an unsigned data type. |