Uses a temporary variable to extend a query.
On the Semantics of SPARQL Queries with Optional Matching under Entailment Regimes
This presentation covers the semantics of SPARQL queries with optional matching features under entailment regimes. It argues that normative semantics may lead to answers that [...]
Simple SPARQL Tutorial: Using the UNION Keyword
Tutorial showing how to modify a query to combine the results of two separate graph patterns (or conditions) using the UNION keyword. The topic is [...]
Simple SPARQL Tutorial: Searching with Blank Nodes
Building on the previous tutorial of the series, this tutorial shows how to construct and run SELECT queries when a dataset has blank nodes.URL: https://www.youtube.com/watch?v=y2jbA2pQL44Keywords: [...]