dataset facet

In the RDF universe, a dataset is a collection of one or more RDF graphs.

In a semantic mesh, there are three (okay, maybe 2.5) kinds of datasets:

  • node flows are dcat:DatasetSeries (which are also dcat:Dataset) and represent an "abstract dataset": they don't have distributions of their own. The node's metadata flow contains metadata about the node and its flows, not the flows' data; flow data is only materialized in flow snapshot distributions.

  • flow snapshots are dcat:Dataset and represent a "concrete dataset": they have one or more snapshot distributions.

  • dataset reference nodes contain a payload dataset and their intramesh identifier refer to that payload dataset in the abstract. The dataset is still contained in a particular kind of node flow, i.e., a data flow. But the flow's identifier refers to a particular flow, whereas the node identifier will become the canonical IRI of the dataset (on Publication).

    • in the case of data flow, they can store their Dataset metadata in the dataset itself, or in their reference flow, or both.

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