Here's a catalogue of SPARQL queries (together with their correspondance in natural language) that can be useful for different purposes. Queries will be provided as independent files inside this folder, to facilitate their maintenance and the generation of references to them from other parts of the ERA ecosystem (e.g., ontology documentation, demo sites, etc.), especially in case of ontology changes. And some of these queries will be also grouped together in SPARQL notebooks, for convenience, providing a unified view over a specific need (e.g., parameter completeness reports per member state).
As a result of these previous queries, the following relationships exist between core parameters and these types of elements, according to the current knowledge graph (this will be validated against the ontology):
12. Summary of the presence of core parameters applicable to tracks' contact line systems per member state.
12.1. Provide all the tracks and contact line systems where core parameters do not appear (example with Spain):
Most of these queries are restricted to the section of line (and its related tracks) that starts in an operational point named Dendermonde and finishes in an operational point named Baasrode-Zuid. Changing the names of the operational points or knowing their URIs or those of the section of line to be requested would allow evaluating these queries in other parts of the knowledge graph.
SPARQL query interface for the ERA Knowledge Graph.