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Structures
olitank edited this page Nov 28, 2025
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These are user-defined data types.
There are several types:
Allows to group different types of data (using elements) under the same name.
An element is either simple (predefined type) or structured (user-defined type).
Other element attributes are:
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Optional: Indicates whether the value is optional.
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Optional / Default Value Expression: An expression used to calculate a default value (null otherwise).
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Multiple: Indicates whether the value is multiple (0 to n elements) or not.
Allows to restrict possible values to a set of named constants (enumeration items).
Does not actually define a data type. It rather allows to reference another structure.