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Dewey Summaries as Multilingual Linked Data. Dewey Breakfast/Update ALA Annual July 11, 2009. Linked Data principles. Three rules Use http-URIs as names for things (identification) When someone looks up a URI, provide useful information (dereferenceability) - PowerPoint PPT Presentation
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Dewey Summaries as Multilingual Linked DataDewey Summaries as
Multilingual Linked Data
Dewey Breakfast/UpdateALA Annual
July 11, 2009
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
Linked Open Data cloudLinked Open Data cloud
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
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/>
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
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
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
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
HTML view across all versions in all languagesHTML view across all versions in all languages
Data view across all versions in all languagesData view across all versions in all languages
HTML view of all versions in a specific languageHTML view of all versions in a specific language
http://dewey.info/class/641/about.sv
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
And it works on my BlackBerry ...And it works on my BlackBerry ...
Thank you!Thank you!
What would you like to do with this?
Ideas for new use cases?
Other comments, suggestions?