Dewey Summaries as Multilingual Linked Data

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?

panzerm@oclc.org