Understands the use of SPARQL functions and operators.
Jena Full Text Search
This documentation explains how to configure and use the Full Text extension to Apache Jena's ARQ (the module is included in Fuseki). The extension combines [...]
Don’t Use a Hammer to Screw in a Nail: Alternatives to REGEX in SPARQL
This brief blog post explains that regular expressions are expensive to evaluate regardless of what language you are using them in. The author suggests that [...]
Equality and Inequality in SPARQL
This brief blog post discusses issues surrounding expression semantics in SPARQL. Practices that people are used to from other languages (like the use of "=" [...]
SPARQL and Linked Data Homework Exercises
This document contains several "written" and "electronic" homework questions originally from the course "Semantic Web Topics" at LeHigh University. They include: Write a series of [...]
All Roads Lead To? Experiments With Gephi, Linked Data and Wikipedia
This blog post shares an example using the Semantic Web Import plugin (available for the Gephi visualization tool) to create a rather complex geospatial visualization. [...]
SPARQL: Using Operators Tutorial and Quiz
This slide tutorial focuses on using various operators in SPARQL queries. Several examples are provided which include the RDF data being queried, the SPARQL query [...]
Foundations of RDF Databases
This older presentation presents the argument that the RDF data model can be viewed as an extension of the traditional database model, rather than as [...]
Toward the Web of Functions: Interoperable High-Order Functions in SPARQL
This video addresses the problem needing to know the specific URI of any third-party custom SPARQL function in order for the computation to be executed [...]
SPARQL Queries for Publications and Authors
This page contains SPARQL queries useful for finding information on authors and publications on VIVO. These query examples, if adapted, have other useful applications as [...]
Querying the Linked Archives Hub data using SPARQL
This blog post provides a few sample SPARQL queries that can be used as a starting point for exploring an unfamiliar dataset. The queries are [...]