interface  | 
BooleanFlag | 
 Event field annotation, signifies that value is a boolean flag, a true or
 false value 
 | 
interface  | 
ContentType | 
 Meta annotation, signifies that an annotation represents a content type, such
 as a timespan or a frequency. 
 | 
interface  | 
DataAmount | 
 Event field annotation, signifies that a value represents an amount of data, for example bytes. 
 | 
interface  | 
Experimental | 
 Annotation that signifies that an element is experimental and may change
 without further notice. 
 | 
interface  | 
Frequency | 
 Event field annotation, signifies that value is a frequency, measured in Hz. 
 | 
interface  | 
MemoryAddress | 
 Event field annotation, signifies that value is a memory address. 
 | 
interface  | 
Percentage | 
 Event field annotation to be used on fractions, typically between 0.0
 and 1.0, to signify that the value is a percentage. 
 | 
interface  | 
Relational | 
 Meta annotation for relational annotations, to be used on annotation. 
 | 
interface  | 
Timespan | 
 Event field annotation, signifies that value is a duration. 
 | 
interface  | 
Timestamp | 
 Event field annotation, signifies that value is a point in time. 
 | 
interface  | 
TransitionFrom | 
 Event field annotation, signifies that the event transitioned from a thread. 
 | 
interface  | 
TransitionTo | 
 Event field annotation, signifies that the event is about to transitions to a thread. 
 | 
interface  | 
Unsigned | 
 Event field annotation, signifies that value is as unsigned data type. 
 |