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Understands how to combine and filter graph patterns using operators such as UNION, OPTIONAL, FILTER, and MINUS.

0 to 60 on SPARQL Queries in 50 Minutes

This webinar provides an introduction to SPARQL, a query language for RDF. Users will gain hands on experience crafting queries, starting simply, but evolving in [...]

By |May 5th, 2018|Comments Off on 0 to 60 on SPARQL Queries in 50 Minutes

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 "=" [...]

By |August 13th, 2017|Comments Off on Equality and Inequality in SPARQL

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 [...]

By |August 13th, 2017|Comments Off on Jena Full Text Search

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 [...]

By |January 20th, 2017|Comments Off on SPARQL and Linked Data Homework Exercises

Ordnance Survey Linked Data: Combining Postcode and Spatial Queries

Building on previous blog posts, the author shows how to query and combine data from two different datasets. Although the datasets were published by the [...]

By |January 15th, 2017|Comments Off on Ordnance Survey Linked Data: Combining Postcode and Spatial Queries

Ordnance Survey Linked Data: A Simple Postcode Query

This blog post shares give some simple examples of what can be done with the Code-Point(R) Open dataset, available as Linked Open Data (LOD). This [...]

By |January 15th, 2017|Comments Off on Ordnance Survey Linked Data: A Simple Postcode Query

Ordnance Survey Linked Data: Simple SPARQL Example

This blog post shares how to retrieve several variables of data from the Ordnance Survey dataset, available as Linked Open Data (LOD). Includes SPARQL queries [...]

By |January 15th, 2017|Comments Off on Ordnance Survey Linked Data: Simple SPARQL Example

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 [...]

By |November 23rd, 2016|Comments Off on SPARQL: Using Operators Tutorial and Quiz

SPARQL: Using DESCRIBE and CONSTRUCT Tutorial and Quiz

This slide tutorial focuses on using DESCRIBE and CONSTRUCT in SPARQL queries, but also includes other basic operators. Several examples are provided which include the [...]

By |November 23rd, 2016|Comments Off on SPARQL: Using DESCRIBE and CONSTRUCT Tutorial and Quiz

SPARQL: Using ASK Tutorial and Quiz

This slide tutorial focuses on using ASK in SPARQL queries, but also includes other basic operators. Several examples are provided which include the RDF data [...]

By |November 23rd, 2016|Comments Off on SPARQL: Using ASK Tutorial and Quiz