Differences between revocation methods

If you want to revoke verifiable documents issued using DID, it will be good to get a better understanding of the differences between the revocation methods using document store or OCSP responder:

Document Store	OCSP Responder
Relies on the blockchain	Relies on a backend server maintained by the issuer
Revoked documents cannot be unrevoked, but will have to be re-issued.	Revoked documents can be unrevoked manually by the issuer.
Costs involved will be for the initial smart contract deployment and for subsequent revocation transactions. Ideal for documents with very few revocations as no maintenance cost will be required.	There will be no Ethereum deployment or transaction costs, but the OCSP responder will need to be maintained indefinitely for the documents to be verified continuously.
Good for all kinds of documents, especially long-term and crucial ones.	Better suited for short-term and non-crucial documents.