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Workshop on Semantic Statistics - Representation of the Data Documentation Initiative using Semantic Web Technologies
The document outlines a workshop on the Data Documentation Initiative (DDI) using semantic web technologies, discussing use cases, integration of ontologies, and consistency checks. It emphasizes the importance of linking DDI metadata to the open data cloud and addresses semantic queries on distributed DDI instances. The agenda includes discussions on comparability of concepts and the challenges of referencing and citation within complex data models.
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Workshop on Semantic Statistics - Representation of the Data Documentation Initiative using Semantic Web Technologies
- 1. Representation of the DataDocumentation 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)
- 2. Agenda • Use Cases •Take-aways and Discussion 2
- 3. Publish and LinkDDI Data and Metadata Linking Open Data cloud diagram, by Richard Cyganiak and Anja Jentzsch. http://lod-cloud.net/ 3
- 4. Semantic Queries • Whatkinds of problems can be solved? • Queries on multiple, distributed and merged DDI instances • Formulation using DDI domain concepts ?question contains questionScheme ?question SELECT ?question ?question WHERE { questionScheme contains ?question. } 4
- 5. Integration of OtherOntologies • 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
- 6. 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
- 7. Concept Hierarchy Variable Concept Concept Concept SimilarConcept Reference SimilarConcept Difference Reference text + html (superClassOf) 7
- 8. Concept Hierarchy Concept subConceptOf hasConcept Variable 8
- 9. DDI Elements‘ Comparability Grade_USA hasCode subClassOf A subClassOf Variable Code subClassOf 1.0 subClassOf hasCode Grade_Germany • Necessary conditions (equality, inequality, similarity, …) 9
- 10. References OtherMaterial type ExternalURL Citation Relationship Reference RelatedTo DCElements ... Reference Title Creator URN … … ... 10
- 11. References OtherMaterial type Drawbacks: ExternalURL Citation Relationship Reference • type • complex data model RelatedTo DCElements ... • no intuitive semantics Reference • bibliographic citation limits Title Creator URN • ensure reusability? … … ... 11
- 12. Semantic References referencesPublication Referencing Publication ID Publication subClassOf X publicationReferencedBy Variable Title Creator Date URL 12
- 13. Agenda • Use Cases •Take-aways and Discussion 13
- 14. http://ddiandsemanticweb.blogspot.com Concept SPARQL Hierarchies Queries Consistency References LOD Cloud Use Cases Comparability Ontology Integration