NodeId values shall be encoded as a JSON object with the fields defined in Table 31.
The abstract NodeId structure is defined in OPC 10000-3 and has three fields Id, IdType and NamespaceIndex. The representation of these abstract fields are described in the table.
Table 31 – JSON Object Definition for a NodeId
|
Name |
Description |
|
IdType |
The IdentifierType encoded as a JSON number. Allowed values are: 0 - UInt32 identifier encoded as a JSON number. 1 - A String identifier encoded as a JSON string. 2 - A Guid identifier encoded as described in 5.4.2.7. 3 - A ByteString identifier encoded as described in 5.4.2.8. This field is omitted for UInt32 identifiers. |
|
Id |
The identifier. The value of the IdType field specifies the encoding of this field. |
|
Namespace |
For reversible encoding this field is a JSON number with the NamespaceIndex. The field is omitted if the NamespaceIndex is 0. For non-reversible encoding this field is the JSON string containing the NamespaceUri associated with the NamespaceIndex unless the NamespaceIndex is 0. If the NamespaceIndex is 0 the field is omitted. |