unify SPARQL examples

[VladimirAlexiev]

• (1) https://sparql.api.identifiers.org/ Browse 14 examples lists 14 examples
• (2) https://github.com/identifiers-org/ontop/blob/main/idorg-ontology/idorg-ontology.ttl#L251 lists 7 sample queries
• (3) https://docs.identifiers.org/pages/sparql.html#sparql-query-examples lists 4 (marked [1]) to be run at this endpoint, and 2 (marked [2]) to be run at another endpoint.
  In particular, it shows a crucial example that uses SERVICE for SPARQL federation.

Please consolidate all examples to (1) and remove them from the other places

• I know that the (1) examples are fed from RDF, but where is their source?
• It's best to roll the examples into the RDF at (2). But the sample queries there do not seem right since they are not connected to anything.
• The couple of queries marked [2] can stay where they are

[renatocjn]

Hi, I'm not sure I understand where the issue is here.

The sparql.api.identifiers.org interface showing 14 examples is an error. It is meant to only show the 7 examples from idorg-ontology.ttl. The server import seems to not behave as expected since it seems to create a additional anonymous node for each example. I plan to look into it soon, but I still haven't had the time.

I'm afraid I don't agree with your suggestion of removing the examples from (3) as most users first encounter the static documentation. Removing those from there would make the page much less useful. There are sufficient links available at (3) so the user can choose to go here if desired.

I don't understand what you mean by the queries at (2) not being connected. Perhaps it wasn't clear that thats where they were loaded from.

[renatocjn]

The issue with duplicated examples is solved