Table 45describes the details of the ComplexType 2017 ServerFacet. This Facet extends the Core ServerFacet to include Variableswith structured data, i.e. data that are composed of multiple elements such as a structure and where the individual elements are exposed as component variables. Support of this Facet requires the implementation of structured DataTypes and Variablesthat make use of these DataTypes. The Read, Write and Subscriptions service set shall support the encoding and decoding of these structured DataTypes. As an option the Servercan also support alternate encodings, such as an XML encoding when the binary protocol is currently used and vice-versa.

Table 45– ComplexType 2017 Server Facet

Group	Conformance Unit / ProfileTitle	Optional
Address Space Model	Address Space DataTypeDefinition Attribute	False
Attribute Services	AttributeAlternate Encoding	True
Attribute Services	AttributeRead Complex	False
Attribute Services	AttributeWrite Complex	False
Monitored Item Services	Monitor Alternate Encoding	True
Monitored Item Services	Monitor Complex Value	True