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OPC does not support types meaning it is not possible in OPC to get information about the type of a node. OPC however supports
properties, which means it is possible to browse the existing properties and what properties a particular node has. DAIS has
extended this to also include types; that is, it is possible to browse existing types, the properties each type has and each
node has a type.
OPC defines the following property sets:
• set 1 of OPC specific properties
• set 2 of OPC recommended properties
• set 3 of vendor specific properties
In DAIS, OPC set 1 properties cannot be browsed through the property-browsing interface (Property). Instead access of set
1 properties is direct in the interfaces as parameters or struct members as is the case for OPC. This means that DAIS exposes
only OPC set 2 and 3 properties through the property browse interface.