Today We’re Linking Data!● If something is identified, it can be linked to, shared, talked about...● Lets make items from our collections linkable to items from other collections! NYTimes Archive.org VIAF DBPedia GeoNames YOUR DATA
The goal of Linked Data isto enable people to sharestructured (information) onthe Web as easily as theyshare documents today.Bizer/Cyganiak/Heath Linked Data Tutorial, linkeddata.orgAdrian Stevensen, UK Web Archives
“The Graph” as an Organizational Data ModelLinked Data includes a paradigm shift from the relational orhierarchical means of modelling data to a graph based model…
Resource Description Format (RDF)● RDF = defined statements comprising a subject, a predicate (property), and an object. These statements are called “Triples”.
Triples for Humans● Triples are statements that describe relationships or links between things ○ The New York dc:publisher Times Is a Publisher of News Articles Dave (foaf:member) The Dave Matthews Is Member of Matthews Band
Triples for MachinesTriples can be serialized in many differentways including ● Resource Description Format ● RDF/XML ● RDFa ● N3 ● Turtle ● etc.but they all describe things in the<subject><predicate><object> formatDescription Formats must be consistent and
Assigning Meaning to Your DataRDF doesnt offer any means to record semantics or meaning.LOD vocabularies and ontologies provide a framework fordetermining how we organize information and how we agree onpredicates… ● RDF Schema (RDFS) ● Ontologies: FOAF, VIAF, OWL (Web Ontology Language), etc. ● Schema.org/Microdata/RDFa 1.1
Machine Access/Querying Your DataSPARQL –provides a formal language with which toask meaning-driven questions of RDF data sets
Attribution and CC License ● Sections of this presentation adapted from materials created by other participants in the LOD-LAM Community ● This presentation available under creative commons Non Commercial-Share Alike:http://creativecommons.org/licenses/by-nc/2.0/
A particular slide catching your eye?
Clipping is a handy way to collect important slides you want to go back to later.