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Understands the major SPARQL result set modifiers, e.g., to limit or sort results, or to return distinct results only once.

Tarql: SPARQL for Tables

Tarql is a command-line tool for converting CSV files to RDF using SPARQL 1.1 syntax. In short, a CSV file’s contents are input into a [...]

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By |August 18th, 2017|Comments Off on Tarql: SPARQL for Tables

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 "=" [...]

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

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 [...]

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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 [...]

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

SPARQL: Using SELECT Tutorial and Quiz

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

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

DBPedia SPARQL Endpoint Exercises

This slide tutorial teaches the user how to form SPARQL queries to answer various questions of interest and retrieve results from DBpedia's SPARQL endpoint. In [...]

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By |November 23rd, 2016|Comments Off on DBPedia SPARQL Endpoint Exercises

Semantic Queries

This is the sixth chapter in MarkLogic's "Semantic Developer's Guide". This chapter discusses the principal techniques and tools used for performing semantic queries on RDF [...]

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By |April 15th, 2016|Comments Off on Semantic Queries

MarkLogic: Introducing SPARQL

A brief tutorial on how to explore a previously loaded graph database using a SPARQL endpoint. Gives several examples of queries using DBpedia and BBC [...]

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By |January 19th, 2016|Comments Off on MarkLogic: Introducing SPARQL

MarkLogic: SPARQL and XQuery together

This exercise covers the use of SPARQL and XQuery together in a few different ways. This involves running a series of queries on the BBC [...]

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By |January 19th, 2016|Comments Off on MarkLogic: SPARQL and XQuery together

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 [...]

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By |January 16th, 2016|Comments Off on SPARQL Queries for Publications and Authors