  An ontology of the DDI 3 data model will be designed by following the
ontology engineering methodology to be evolved based on state-of-the-art
methodologies. Hence DDI 3 data and metadata can be represented in form of a
standard web interchange format RDF and processed by highly available RDF
tools. As a consequence the DDI community has the possibility to publish and
link LOD data sets to become part of the LOD cloud.
