An Introduction to Linked Data and Microdata
Jan 20, 2015
An Introduction to Linked Dataand Microdata
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!
NYTimesVIAF
DBPediaYOUR DATA
Archive.org
GeoNames
The goal of Linked Data is to enable people to share structured (information) on the Web as easily as they share documents today.Bizer/Cyganiak/Heath Linked Data Tutorial, linkeddata.orgAdrian Stevensen, UK Web Archives
Linked Data Design Issues
● URIs● LD Design Issues● Triples
http://www.w3.org/DesignIssues/LinkedData.html
“The Graph” as an Organizational Data Model
Linked Data includes a paradigm shift from the relational or hierarchical 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○
News Articles The New York
Timesdc:publisherIs a Publisher of
The Dave Matthews
Band
Dave Matthews
(foaf:member) Is Member of
Triples for Machines
Triples can be serialized in many different ways including
● Resource Description Format ● RDF/XML ● RDFa ● N3 ● Turtle
● etc. but they all describe things in the <subject><predicate><object> format
Description Formats must be consistent and predictable for machines to be able to interpret the information
Assigning Meaning to Your DataRDF doesn't offer any means to record semantics or meaning.LOD vocabularies and ontologies provide a framework for determining how we organize information and how we agree on predicates…
● 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 to ask 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/