Certificate lineage: the concept your tools already use but nobody named
The word “certificate” means too many different things. When someone says “the certificate for example.com,” they might mean the public key the CA signed. They might mean the key-pair sitting on the filesystem. They might mean the signature that expires in 47 days. Or they might mean all the things together, that you’ve been renewing for the last 10 years. That last one doesn’t have a name in any PKI standard. And it should.