Metadata Extraction from Open ed X Online Courses
- Slides: 23
“Metadata Extraction from Open ed. X Online Courses Using Dynamic Mapping of No. SQL Queries” Dmitry Mouromtsev, Aleksei Romanov, Dmitry Volchek and Fedor Kozlov Laboratory ISST @ ITMO University, St. Petersburg, Russia
The evolution of education technologies
MOOC statistics
Course distribution
Students enrollment in edx. org
The Open ed. X platform
Stay Linked • Use semantics to make education materials reusable and flexible • Interlink different types of data • All advantages of Linked Data for education
Just Imagine
Basics • Enhanced Course Ontology for Open ed. X Platform • Triple store and SPARQL endpoint as a backend • Data providers for automatic data extraction
Course structure hierarchy
Course structure hierarchy
Course structure hierarchy
Course structure hierarchy
Ontology development tools • Protégé - open source ontology editor http: //protege. stanford. edu • Ontodia - free online OWL and RDF diagramming tool http: //ontodia. org
Ontology model (course and users) • 18 Classes 14 Object Properties 23 Data Properties • based on Top-level ontologies: AIISO, BIBO, TEACH
Ontology model (course structure)
Method • The Course Structure API not provides the information about content • Data about courses and their content is stored in Mongo. DB database • SQL database rewriters as are no use
Method
Implementation
Outcomes SPARQL queries to extracted metadata select ? s ? p ? o where {? s ? p <http: //www. semanticweb. org/Edx. Ontology/Main#Object. Id('5690 d 8 ac 457 ebc 0 ba 9429 fb 5')>}
Conclusion • Download course data via SPARQL endpoint • Develop new and update existing courses by refining and reusing already existing information. • Interlink and relate distinct courses
Future Work • Documentation and implementation of the described method as a component of Open ed. X • Full ontology mapping with course information on any language • Recommendation service for course developers • Native ed. X integration
Thanks! Dmitry Volchek - dvolchekspb@gmail. com Romanov Aleksei - gloomspb@gmail. com https: //github. com/ailabitmo/edx-ontology Russia, Saint-Petersburg, 2016
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