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If I am hosting a hierarchical CMDI metadata collection, do I need to offer all records over OAI-PMH or only the root nodes?

Submitted by Dieter Van Uytvanck on
Short answer: as indicated in the protocol, you need to offer all records. There is no automatic harvesting of any of the child nodes.
Long answer: in the case of our toy example hierarchy (
You would need to provide the following files over OAI-PMH:
Providing collection_root.cmdi (or even collection_olac.cmdi and collection_lrt_inventory.cmdi) is not enough, as all OAI harvesters are protocol-agnostic and thus do not know about CMDI’s hierarchy building! CMDI-consuming applications, such as the , also need the physical files locally.