Linked Data Principles
Oregon Digital Linked Data
Workshop, Eugene, Oregon
November 25, 2013
Tom Johnson thomas.
1. Use URIs as names for things
2. Use HTTP URIs so that people can look up those names.
3. When someone looks up a URI, provide useful
information, using the standards (RDF*, SPARQL)
4. Include links to other URIs. so that they can discover
➢ Hierarchical Metadata Terms
⇒ relationships between vocabularies
⇒ e.g. mrel:photographer < dc:contributor
➢ Domain and Range Statements
⇒ Limit vocabulary application for data quality and
➢ Objects in one statement can be subjects in
➢ Model is “Open World”
⇒ Data we don’t have is assumed to be unknown
locally, not globally.
➢ Outside data is valued
➢ Linking is web scale
➢ Linked Open Vocabularies (vocabulary search engine)
➢ W3C Library Linked Data Incubator Group Reports http:
➢ Open Metadata Registry (hosts RDA vocabularies) http:
Challenges from readings?
Questions about why & how?