问题
I am trying to practice myself in writing some SPARQL queries. Does anybody know where I can find the best material? Where I can find some RDF file and some tasks to try to write my own SPARQL queries. I am good with SQL, and I just need some material to learn to write in SPARQL.
回答1:
All sample RDF and queries from the O'Reilly book "Learning SPARQL" are available on the book's home page at learningsparql.com. (Full disclosure: I wrote it.)
回答2:
data.gov and DataHub have a lot of downloadable RDF data sets. If a public SPARQL endpoint is available, DataHub usually lists it. For example: the Rijksmuseum page offers RDF downloads and a link to the endpoint.
My Experiment has a tutorial with examples and a working endpoint.
If you download Jena, you get their example RDF files and SPARQL queries.
Uniprot has a SPARQL endpoint with examples. The RDF is available for download. some of the files are quite large.
There's a large number of downloadable ontologies in RDF format at the OBO Foundry.
Watch this: Probe the Semantic Web with SPARQL
SPARQL Cheat Sheet Slide Deck
As mentioned above: the website for Bob DuCharme's excellent Learning SPARQL Book
来源：https://stackoverflow.com/questions/43909933/where-i-can-find-some-rdf-and-some-sparql-queries-to-practise-to-write-in-sparql