The IWoTAssetType is an Interface representing the WoT asset functionality. It has a component representing a File Object that can be used to upload the WoT TD file. It is defined in Table 9.

Table 9 – IWoTAssetType Definition

Attribute	Value
BrowseName	IWoTAssetType
IsAbstract	True
References	NodeClass	BrowseName	DataType	TypeDefinition	Other
Subtype of the 0:BaseInterfaceType defined in OPC 10000-5.
1:HasWoTComponent	Variable	<WoTPropertyName>	0:BaseDataType	0:BaseDataVariableType	OP
0:HasComponent	Object	WoTFile		WoTAssetFileType	M
Conformance Units
WoT Connectivity Base Functionality

When the asset configuration is complete, the Server may update the internal configuration of existing Variable Nodes or it may add new Variable Nodes to represent the asset. Each WoT property in the forms section of the TD shall have exactly one VariableNode associated with it.

The WoTAsset Object must have hierarchical HasWoTComponent references to the newly created Variable Nodes, one for each WoT property.

The BrowseName of the Variable Node shall have a name equal to the WoT property name.

If a mapping to a WoT property cannot be done (e.g. the data cannot be read from the connected asset), the built-in status code Bad_ConfigurationError will be returned when the Value of the Variable is read.

Each WoT property type is mapped to the corresponding OPC UA built-in DataType using the following mapping table:

Table 10 – WoT property type mapping

WoT Property Type	OPC UA Data Type
Boolean	Boolean
Number	Double
Integer	Int64
Object	No mapping
String	String
Null	No mapping
Array[Items]	Array[of one of above defined types]