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Interacting with RDF data

Eurostat Linked Data

his is a Linked Data version of the Eurostat data with the goal to provide 5 star Linked Open Data on the European level, in [...]

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By |August 18th, 2017|Comments Off on Eurostat Linked Data

URI design for RDF conversion of CSV-based data

The sharing of comma-separated files is very common, and a common set of problems arise upon the receipt and processing of data within this format. [...]

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By |August 18th, 2017|Comments Off on URI design for RDF conversion of CSV-based data

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

Using the Convert CSV to RDF ingest tool

This guide will walk through the use of the Convert CSV to RDF tool, a semi-automated method of converting comma separated or tab separated text [...]

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By |August 18th, 2017|Comments Off on Using the Convert CSV to RDF ingest tool

Linked Statistical Data Analysis

Linked Data design principles are increasingly employed to publish and consume high-fidelity, heterogeneous statistical datasets in a distributed fashion. While vast amounts of linked statistics [...]

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By |August 13th, 2017|Comments Off on Linked Statistical Data Analysis

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 [...]

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

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 [...]

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By |August 13th, 2017|Comments Off on Don’t Use a Hammer to Screw in a Nail: Alternatives to REGEX in SPARQL

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

Desiderata for an authoritative Representation of MeSH in RDF

Although the Semantic Web provides a framework for the integration of resources on the web, datasets are not always made available in RDF by their [...]

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By |August 8th, 2017|Comments Off on Desiderata for an authoritative Representation of MeSH in RDF

MeSH RDF SPARQL Endpoint Query Editor

This interface allows users to query the RDF representation of Medical Subject Headings, a biomedical vocabulary produced by the National Library of Medicine. Available outputs: [...]

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By |August 8th, 2017|Comments Off on MeSH RDF SPARQL Endpoint Query Editor