"IIIF Change Discovery provides similar functionality to the
Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH), but it is focused on IIIF content resources and is based on linked data and W3C standards such as
JSON-LD and
Activity Streams. For cultural institutions that provide metadata to the data space for cultural heritage, the implementation of IIIF Change Discovery provides an alternative to implementing OAI-PMH."