Dewey Summaries as Multilingual Linked Data
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Dewey Summaries as Multilingual Linked DataDewey Summaries as
Multilingual Linked Data
Dewey Breakfast/UpdateALA Annual
July 11, 2009
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Linked Data principlesLinked Data principles
• Three rules
1. Use http-URIs as names for things (identification)
2. When someone looks up a URI, provide useful information (dereferenceability)
3. Include links to other URIs (relationships)
• Maxims
• “Raw data now!” (TBL)
• Being able to ask new question about data
• Adding information collaboratively
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Linked Open Data cloudLinked Open Data cloud
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Requirements for publishing Linked DataRequirements for publishing Linked Data
- Identification
- Every data entity has a URI
- Access
- HTTP as protocol (established infrastructure: WWW)
- User agent indicates which data formats it accepts
- Representation
- for machines
- RDF as data model
- SKOS, Dublin Core, ccREL, etc. as vocabularies
- for humans
- HTML, etc.
- “Openness” of the data set
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Use Cases: Basic web lookupUse Cases: Basic web lookup
“If someone has the URI of that thing, what relationships to what other objects is it useful to know about?”(Tim Berners-Lee)
A web page for every class of the Dewey Summaries, e.g.:
<http://dewey.info/class/641/>
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Use Cases: Basic linkingUse Cases: Basic linking
Example: Dublin Core metadata
<dc:title>Petrology.</dc:title><dc:creator>Huang, Walter Ta, 1924-</dc:creator><dc:subject xsi:type="http://purl.org/dc/terms/DDC">552</dc:subject>
Use of a link (URI) instead of arbitrary text
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Use Cases: Basic linkingUse Cases: Basic linking
Example: Dublin Core metadata
<dc:title>Petrology.</dc:title><dc:creator>Huang, Walter Ta, 1924-</dc:creator><dc:subject rdf:resource="http://dewey.info/class/552/e16/" />
Use of a link (URI) instead of arbitrary text
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Service: Dewey Summaries as Linked DataService: Dewey Summaries as Linked Data
- External summaries of DDC 22
- Main Classes, Divisions, Sections
- Accessible
- as RDF data or HTML web pages
- in 9 languages
- Reusable
- by anyone
- under terms of Creative Commons BY-NC-ND 3.0 license
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Demo: Dewey Summaries as Linked DataDemo: Dewey Summaries as Linked Data
http://dewey.info/class/641/
http://dewey.info/class/641/about.rdf
http://dewey.info/class/641/about.en
http://dewey.info/class/641/about.sv
http://dewey.info/class/641/2009/06/about.ar.html
http://dewey.info/class/641/2009/01/about.ar.rdf
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HTML view across all versions in all languagesHTML view across all versions in all languages
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Data view across all versions in all languagesData view across all versions in all languages
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HTML view of all versions in a specific languageHTML view of all versions in a specific language
http://dewey.info/class/641/about.sv
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Data view of a specific version in a specific languageData view of a specific version in a specific language
http://dewey.info/class/641/2009/06/about.ar.rdf
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And it works on my BlackBerry ...And it works on my BlackBerry ...
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Thank you!Thank you!
What would you like to do with this?
Ideas for new use cases?
Other comments, suggestions?