search

zazuko / rdf-cube-view-query

RDF Cube View Schema query library
2 stars 3 forks source link

Federated queries for LookUp Sources #63

Open l00mi opened 3 years ago

l00mi commented 3 years ago

We need to query some data from external sources to create maps.

<https://ld.admin.ch/> {
  <observation> <municipality> <https://ld.admin.ch/canton/23> .
  <https://ld.admin.ch/canton/23> <hasGeometry>  <https://ld.geo.admin.ch/boundaries/canton/geometry-g1/23:2021>.
}

<https://ld.geo.admin.ch/> {
  <https://ld.geo.admin.ch/boundaries/canton/geometry-g1/23:2021> <http://www.opengis.net/ont/geosparql#asWKT> "coords ..".
}
jstcki commented 3 years ago

How is it even possible to discover if an IRI is in another store than the observation? And if not, in which store under which endpoint it actually is has to be accessed?

l00mi commented 3 years ago

That is the topic of this issue. One way e.g. is to define a specific endpoint by the FQDN of the subject triple. Another would be to define it explicitly in the data through shapes.

l00mi commented 2 years ago

A real-world example can be found at https://s.zazuko.com/VmSCR It hat the dimension "cantons" which are pointing to cantons e.g. https://ld.admin.ch/canton/23 which point to e.g. https://geo.ld.admin.ch/boundaries/canton/geometry-g1/23:2021