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DDI Lifecycle 4.0 is managed using a Model First development approach. Content additions and changes are added to the model and the serialization formats are automatically generated. The metadata content of DDI 3.3 has been converted into the new 4.0 model.
The ddi-lifecycle-4.0-beta.1.zip package includes:
schema.xsd - XML Schema
jsonSchema.json - JSON Schema
umlddi4.xmi - OMG's UML XMI 2.5
RDF:
ddi4.owl - RDF OWL (closed with restrictions)
ddi4.owl.ttl - RDF OWL (open)
ddi4.shex - ShEx
ddi4.shacl- SHACL
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