What is Linked Data?

Linked Data is about making relationships between our data more explicit in machine-readable formats. A Linked Data statement, called a RDF Triple, is usually in the format of <subject> <predicate> <object>.

What we think of as "bibliographic records" are, in a linked-data context, just a collection of statements that follow this basic RDF triple model. Any subject, predicate, or object can be a string, an URI, or a blank node. A collection of these triples makes up a RDF graph. In Fedora 4, each object has a RDF graph made up the descriptive, administrative, and structural triples.

One of the most exciting possibilities of using RDF graphs for Fedora Metadata Objects is the easy of including multiple vocabularies in the same object. Why is the important? As we increase our services to our communities, we can support and use their vocabularies instead of trying to shoehorn their information into our own standards. A growing collection of these vocabularies is being maintained at http://lov.okfn.org/dataset/lov/.

One Triple

Subject - Pride and Prejudice

Predicate - rda:languageOfWork

Object - English

Subject Predicate Object
http://localhost:8080/rest/bibframe/Work/543d792d2e7ec303a3a0120d http://fedora.info/definitions/v4/repository#created 2014-10-14T19:22:02.148Z
http://localhost:8080/rest/bibframe/Work/543d792d2e7ec303a3a0120d http://bibframe.org/vocab/language http://id.loc.gov/vocabulary/languages/eng
http://localhost:8080/rest/marc/1234 http://marc21rdf.info/elements/2XX/M260__c c[1942]
http://localhost:8080/rest/bibframe/Work/543d792d2e7ec303a3a0120d http://bibframe.org/vocab/title Go down, Moses