Type result instance » History » Version 13

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Paolo Manghi, 03/02/2017 10:17


Type: Instance

Property Type Multiplicity Description
License Qualifier 0..1 The license value associated to the instance
Embargo end-date Date 0..1 empty if the licenseClass does not imply an embargo
Instance Type Qualifier 0..1 Instance typology as described by a defined vocabulary
WebResource String 1..N http url of the resource
Format Structured(String,-,Provenance) 0..1 maps the dc:format element
Relationship Target Type Multiplicity Description
CollectedFrom [1] Datasource 1..N A Datasource from which this instance has been collected (e.g. an aggregator of institutional repositories)
HostedBy [1] Datasource 1..N A Datasource that hosts the instance (e.g. an institutional repository)

[1] The difference betweem collectedFrom and hostedBy relationships is introduced to model the concept of Aggregator data sources. Aggregator data sources are themselves aggregating information packages from a set of data sources; they differ from the data sources they aggregate, but play an equally important role in delivering the entities to OpenAIRE, and should therefore be given visibility. Accordingly, in order to guarantee visibility and ROI (Return Of Investment) to all data sources involved in this chain, when OpenAIRE collects information packages from Aggregators such packages are characterised by the data source from which they were “collected”, i.e. the aggregator itself, and the data sources where they were originally "hosted". Note that in the case of other typologies of data sources (e.g. repositories) collectedFrom and hostedBy refer to the same data source.