# Summary
- The schema for CCO's IRIs has changed. They use a new namespace and opaque local identifiers.
- There are no other changes to the ontologies between v1.7 and v2.0.

## Examples
- Ontology Main IRI: https://www.commoncoreontologies.org/ArtifactOntology
- Ontology Version IRI: https://www.commoncoreontologies.org/2023-11-04/ArtifactOntology
- Ontology Element: https://www.commoncoreontologies.org/ont00000958 [Information Content Entity]
- MRO Ontology Element: https://www.commoncoreontologies.org/mro/ont00001808 [is about]
 
A mapping file is located [here](https://github.com/CommonCoreOntology/CommonCoreOntologies/tree/develop/documentation/mappping-new-iris).
