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How do DDI InstanceVariables link or correspond to SDTH VariableInstance? #4

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DanSmith opened this issue Sep 20, 2024 · 1 comment
Open

How do DDI InstanceVariables link or correspond to SDTH VariableInstance? #4

DanSmith opened this issue Sep 20, 2024 · 1 comment

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@DanSmith
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@altergc
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altergc commented Sep 20, 2024

An SDTH:VariableInstance refers to a set of values including their order, coding, formatting, and other attributes. This means that a VariableInstance can exist in more than one DataframeInstance and/or FileInstance. It also implies that a VariableInstance is an abstraction, because it is not tied to a single instantiation.

How is DDI Instance Variable defined? Is a DDI Instance Variable is defined by its existence in a physical data file at rest?

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@DanSmith @altergc