QL4MDR: a GraphQL query language for ISO 11179-based metadata repositories.
Hannes UlrichJori KernDeniz TasAnn-Kristin Kock-SchoppenhauerFrank ÜckertJosef IngenerfMartin LablansPublished in: BMC Medical Informatics Decis. Mak. (2019)
Keyphrases
- query language
- metadata
- learning objects
- digital libraries
- topic maps
- database
- data model
- metadata records
- query evaluation
- open access
- relational algebra
- databases
- learning resources
- object oriented
- complex objects
- semantic data
- linked open data
- digital documents
- metadata management
- metadata schemas
- regular expressions
- e learning
- data warehouse
- digital objects
- open archives initiative
- structured data
- metadata standards
- metadata extraction
- document repositories
- xml schema
- learning object repositories
- xml data
- resource discovery
- learning process
- learning object metadata
- digital repositories
- multimedia
- rdf data
- multimedia content