![]() ![]() Dimensions and attributes: There are two types of descriptor concepts: dimensions, which both identify and describe the data, and attributes, which are purely descriptive.The descriptor concepts mentioned in point 1 can be attached at various levels in this hierarchy. Packaging structure: Statistical data can be grouped together at the following levels: the observation level (the measurement of some phenomenon) the series level (the measurement of some phenomenon over time, usually at regular intervals) the group level (a group of series – a well-known example being the sibling group, a set of series which are identical, except for the fact that they are measured with different frequencies) and the dataset level (made up of several groups, to cover a specific statistical domain for instance).For example, on its own the figure 1.3312 is pretty meaningless, but if we know that this is an exchange rate for the CDN dollar against the US dollar on November 19th, 2019, it starts to make more sense. ![]()
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