an introduction to linked data and microdata
DESCRIPTION
An introduction to Linked Data and Microdata presented by Kris Carpenter-Negulescu, Richard Rodgers, and Matt Zumwalt at the 2011 DLF ForumTRANSCRIPT
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An Introduction to Linked Dataand Microdata
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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
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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
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Linked Data Design Issues
● URIs● LD Design Issues● Triples
http://www.w3.org/DesignIssues/LinkedData.html
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“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…
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Resource Description Format (RDF)● RDF = defined statements comprising a
subject, a predicate (property), and an object. These statements are called “Triples”.
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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
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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
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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
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Machine Access/Querying Your DataSPARQL –provides a formal language with which to ask meaning-driven questions of RDF data sets
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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/