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LOD introduction and benefits
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Linked Open Data許禮峰、蕭鈺融、方怡文
Outline
1. Linked Open Data (LOD)LOD Background
LOD Definition
LOD Star
Open Data
2. Semantic WebSemantic Web Purpose
Semantic Web Difference
3. Conclusion
4. Reference
1. LOD - Background
Name: Apple Name: Apple
1. LOD - Background
Name: Apple Name: Apple
Description: Notebook Description: Fruit
LOD Definition
URI (Uniform Resource Identifier)URL (locator)URN (name)
LOD Definition
Tim Berners Lee’s 4 Rules
1. Use URIs to denote things.2. Use HTTP URIs so that these things can be
referred to and looked up ("dereferenced") by people and user agents.
3. Provide useful information about the thing when its URI is dereferenced, leveraging standards such as RDF, SPARQL.
4. Include links to other related things (using their URIs) when publishing data on the Web.
LOD Definition
LOD Star
☆ Publish data on the Web in any format (e.g., PDF, JPEG) accompanied by an explicit Open License (expression of rights).
☆☆ Publish structured data on the Web in a machine-readable format (e.g., XML EXCEL).
☆☆☆ Publish structured data on the Web in a documented, non-proprietary data format (e.g., CSV, KML).
☆☆☆☆ Publish structured data on the Web as RDF (eg Turtle, RDFa, JSON-LD, SPARQL)
☆☆☆☆☆ In your RDF, have the identifiers be links (URLs) to useful data sources.
LOD Star-1
LOD Star-2
LOD Star-3
LOD Star-4
LOD Star-5
Open Data
Without Permission
Without License
Open Data
Open Data - I Culture
Open Data - Taipei
Open Data – g0v
Open Data - Extension
https://github.com/bee040811/IcultureOpenData
2. Semantic Web
Tim Berners Lee
Semantic Web - Purpose
Find, Share, and Combine information more easily.
The semantic web is a vision of information that can be readily interpreted by machines
Machines can perform more of the tedious work involved in finding, combining, and acting upon information on the web
Semantic Web - Difference
3. Conclusion
Machine readable
Links to your data and search engine indices can increase the visibility of your data
Structured data can be interlinked and become more useful
4. References
1. Linked Open DataWiki: http://en.wikipedia.org/wiki/Linked_data
W3C: http://www.w3.org/TR/ld-glossary/
2. Open DataI Culture: http://cloud.culture.tw/opendata/
Taipei : http://data.taipei.gov.tw/
g0v : http://data.g0v.tw/
Q&A
THE END