Workshop on Semantic Statistics - Representation of the Data Documentation Initiative using Semantic Web Technologies

Representation of theData Documentation Initiative using Semantic Web Technologies Workshop on Semantic Statistics 12.09.2011 – 16.09.2011 Thomas Bosch (research associate, GESIS Leibniz Institute for the Social Sciences)

Agenda• Use Cases• Take-aways and Discussion 2

Publish and Link DDI Data and Metadata Linking Open Data cloud diagram, by Richard Cyganiak and Anja Jentzsch. http://lod-cloud.net/ 3

Semantic Queries• What kinds of problems can be solved?• Queries on multiple, distributed and merged DDI instances• Formulation using DDI domain concepts ?question contains questionScheme ?questionSELECT ?question ?questionWHERE { questionScheme contains ?question. } 4

Integration of Other Ontologies• Domain ontologies classes can relate to similar concepts of external ontologies• Reasoner may use additional semantic information DDI Other Domain Ontologies Ontology (Question) (Question) 5

DDI Consistency Check• Definition of consistency• OWL reasoning techniques • Class consistency • Global consistency• Global consistency of DDI ontology Global consistency of DDI data model 6

Concept HierarchyVariable Concept Concept Concept SimilarConceptReference SimilarConcept Difference Reference text + html (superClassOf) 7

Concept Hierarchy Concept subConceptOf hasConceptVariable 8

DDI Elements‘ Comparability Grade_USA hasCode subClassOf A subClassOfVariable Code subClassOf 1.0 subClassOf hasCode Grade_Germany• Necessary conditions (equality, inequality, similarity, …) 9

References OtherMaterial type ExternalURL Citation Relationship Reference RelatedTo DCElements ... ReferenceTitle Creator URN … … ... 10

References OtherMaterial type Drawbacks: ExternalURL Citation Relationship Reference • type • complex data model RelatedTo DCElements ... • no intuitive semantics Reference • bibliographic citation limitsTitle Creator URN • ensure reusability? … … ... 11

Semantic References referencesPublicationReferencing Publication IDPublication subClassOf X publicationReferencedBy Variable Title Creator Date URL 12

Agenda• Use Cases• Take-aways and Discussion 13

http://ddiandsemanticweb.blogspot.com Concept SPARQL Hierarchies Queries Consistency References LOD Cloud Use Cases Comparability Ontology Integration

Workshop on Semantic Statistics - Representation of the Data Documentation Initiative using Semantic Web Technologies

by Thomas Bosch on Dec 14, 2011

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Workshop on Semantic Statistics - Representation of the Data Documentation Initiative using Semantic Web Technologies Presentation Transcript