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Linked Data Ryan McAlister
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What is Linked Data A method of publishing structured data so that it can be interlinked and become more useful. Extends HTTP, RDF, AND URIs to share information in a way that can be read automatically by computers Enables data from different sources to be connected and queried.
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Four Principles of Linked Data
Use URIs to name things Use HTTP URIs so that people can look up those names When someone looks up a URI, provide useful information, using the standards (RDF, SPARQL) Include links to other URIs, so that they can discover more things.
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Datasets CKAN – registry of open data and content packages by the Open Knowledge Foundation DBpedia – dataset containing extracted data from Wikipedia GeoNames – provides RDF descriptions of more than 7,500,00 geographical features. FOAF – a dataset describing persons, their properties and relationships
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Example
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5 Star Linked Data
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Data is accessible on the web
You can look, print, and share it
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Everything that 1 star data can do
Able to process it with proprietary software Export into another format
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Same as 2 Now we can manipulate the data without being confined to any particular software
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Same as 3 It’s now in the web. All data items have a URI You can link it from any other place.
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Same as 4. Data is now discoverable Discover more related data Increase the value of the data
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In Conclusion Linked Data is a method of linking data on the web to make it more accessible for everyone, and to make discovering new things easier.
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