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Short description
Once machine-readable (meta)data is exposed, it can be used. Triple stores, such as GraphDB [GraphDB] and Blazegraph [Blazegraph], provide a SPARQL endpoint. This endpoint allows the (meta)data stored in the triple store to be queried using the SPARQL query language, provided the user has been granted access[De Novo]. Queries can be performed in a variety of ways, for example via a form provided by the endpoint or programmatically using e.g. JavaScript, C#, Java, or Python. Query results can be returned in a variety of formats, such, such as HTML, JSON, XML and CSV. Furthermore, since the introduction of SPARQL 1.1, federated querying is supported [w3_sparql]. With federated querying a user can direct a portion of a query to a particular SPARQL endpoint. Results are returned to the federated query processor, which combines the results.
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Step 2
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Practical examples from the community
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