For the following illustrations, the legend is as follows:
Figure 1 – OPC UA standard definitions
Additional definitions:
Figure 2 – OPC UA and additional definitions
Table 10 describes the additional definitions.
Table 10 – Description of additional definitions
|
Node element |
Graphical representation |
Definition of node element |
|
Mandatory Object |
Rectangular Frame |
A mandatory object with its type definition |
|
Optional Object |
Rectangular bold dashed Frame |
An optional object with its type definition |
|
Mandatory Placeholder Object |
Rectangular bold Frame |
A mandatory placeholder for objects with its type definition |
|
Optional Placeholder Object |
Rectangular dotted Frame |
An optional placeholder for objects with its type definition |
|
ObjectType |
Rectangular Frame with shadow |
An object type with its type definition |
|
VariableType |
Rounded rectangular Frame with shadow |
A variable type with its type definition |
|
Mandatory Variable |
Rectangular Frame with rounded corners |
A mandatory variable with its type definition |
|
Optional Variable |
Dotted rectangular Frame with rounded corners |
An optional variable with its type definition |