6.6.6 Annotation DataType

Table 47 defines the structure of the Annotation used for the data to return in a HistoryRead.

This DataType describes Annotation structure information for the history data items. Its elements are defined in Table 55.

Table 55 – Annotation Structure
NameTypeDescription
AnnotationStructure

message

String Annotation message or text.

userName

StringThe user that added the Annotation, as supplied by the underlying system.

annotationTime

UtcTimeThe time the Annotation was added. This will probably be different than the SourceTimestamp.

Its representation in the AddressSpace is defined in Table 56.

Table 56 – Annotation definition
Attribute Value
BrowseNameAnnotation
IsAbstractFalse
References NodeClass BrowseName DataType TypeDefinition Other
Subtype of the Structure defined in OPC 10000-3
Conformance Units
Historical Access Annotations