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D2000 system defines the term structure as a particular number of named items, to which it is possible to specify the properties as a value type, start value, saving start value, limits. Structure in the system is defined by an object Structure definition, so a specific name is assigned to it. Structure definition (holds no value) represents a particular model, which is used (by in the form way of a reference) in the definition of other objects:
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- The Device definition object defines the structure of the Device type object - it is a Structured device definition.
- The Device definition supports supports all types of columns such as Structure definition, in addition, columns of Internal item type (used to connect another D2000 object to the device) and Device (used to connect another device - subdevice).
- The Device definition can alternatively be defined as an array of objects with a defined of Devices that are of another Device Definition type - this is an Array device definition (e.g. let's have DD.Generator and DD.GeneratorArr derived from it).
- It is thus possible to build a "tree" of devices, while the D2000 Server process ensures a consistent naming convention for objects connected to the device items of Internal item and Device type.
Thus, in principle, the concept of devices allows the creation of tree structures with the provision of a uniform naming convention of the objects from which the trees are created.
For each column (item) at the level of an object of Device definition it is possible to define the following attributes:
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