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  | 
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  | 
MemoryAddress | 
 Event field annotation, specifies that the value is a memory address. 
 | 
interface  | 
Percentage | 
 Event field annotation to use on fractions, typically between 0.0
 and 1.0, to specify that the value is a percentage. 
 | 
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  | 
Unsigned | 
 Event field annotation, specifies that the value is of an unsigned data type. 
 |