"Attribute Read Client Facet" Profile
This Facet defines the ability to read Attribute values of Nodes.
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Address Space Model
Address Space Client Atomicity
Access the NonatomicRead or NonatomicWrite flags in the AccessLevelEx Attribute of Variable Nodes to determine whether Read or Write operations can be performed in atomic manner. This information will typically be shown to a user for further action.
Address Space Client Full Array Only
Access the WriteFullArrayOnly flag in the AccessLevelEx Attribute of Variable Nodes with non-scalar data types to determine whether writing to an array with an IndexRange is allowed.
Address Space Client Complex Data Dictionary
Uses and understands arbitrary structured DataTypes via Data Dictionary. Note that V1.04 of OPC UA Part 3 specifies a simplified approach using the new DataTypeDefinition Attribute. The "Address Space Client DataTypeDefinition Attribute" ConformanceUnit requires support of the DataTypeDefinition Attribute.
Address Space Client DataTypeDefinition Attribute
Uses and understands arbitrary structured DataTypes where the meta data and encoding information are exposed with the StructureDefinitionType via the DataTypeDefinition Attribute.
Attribute Client Read Base
Use the Read Service to read one or more Attributes of one or more Nodes.
Clients shall use bulk operations whenever possible to reduce the number of Service invocations.
Attribute Client Read by Index
Use the IndexRange to select a single element or a range of elements when the Attribute value is an array.
Attribute Client Read with proper Encoding
This ConformanceUnit refers to the ability of a Client to discover the available encodings and choose a specific one when calling the Read Service.
Attribute Client Read Complex
Read and decode Values with structured DataTypes.