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Table 44 describes the details of the ComplexType Server Facet. This Facet extends the Core Server Facet to include Variables with Complex 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 Variables that 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 Server can also support alternate encodings, such as an XML encoding when the binary protocol is currently used and vice-versa.

Table 44 – ComplexType Server Facet

Group	Conformance Unit / Profile Title	Optional
Address Space Model	Address Space Complex Data Dictionary	False
Attribute Services	Attribute Alternate Encoding	True
Attribute Services	Attribute Read Complex	False
Attribute Services	Attribute Write Complex	False
Monitored Item Services	Monitor Alternate Encoding	True