Summary of Attributes of the Node Classes

This topic contains the following sections:

Image 1 summarises all attributes defined and points out which node classes use them either optional (O) or mandatory (M).

Figure 1: Overview about attributes

Bit mask for WriteMask and UserWriteMask

Figure 2: Bit mask for WriteMask and UserWriteMask

EventNotifier

Field	Bit	Description
SubscribeTo Events	0	Indicates if it can be used to subscribe to Events (0 means cannot be used to subscribe to Events, 1 means can be used to subscribe to Events).
Reserved	1	Reserved for future use. Shall always be zero.
HistoryRead	2	Indicates if the history of the Events is readable (0 means not readable, 1 means readable).
HistoryWrite	3	Indicates if the history of the Events is writable (0 means not writable, 1 means writable).
Reserved	4:7	Reserved for future use. Shall always be zero.

AccessLevel

Field	Bit	Description
CurrentRead	0	Indicates if the current value is readable (0 means not readable, 1 means readable).
CurrentWrite	1	Indicates if the current value is writable (0 means not writable, 1 means writable).
HistoryRead	2	Indicates if the history of the value is readable (0 means not readable, 1 means readable).
HistoryWrite	3	Indicates if the history of the value is writable (0 means not writable, 1 means writable).
SemanticChange	4	Indicates if the history of the value is writable (0 means not writable, 1 means writable).
Reserved	5:7	Reserved for future use. Shall always be zero.

UserAccessLevel

Field	Bit	Description
CurrentRead	0	Indicates if the current value is readable (0 means not readable, 1 means readable).
CurrentWrite	1	Indicates if the current value is writable (0 means not writable, 1 means writable).
HistoryRead	2	Indicates if the history of the value is readable (0 means not readable, 1 means readable).
HistoryWrite	3	Indicates if the history of the value is writable (0 means not writable, 1 means writable).
Reserved	4:7	Reserved for future use. Shall always be zero.