=for comment "uses" could as well be "abuses"...
-The private/public key pair that an B<EVP_PKEY> contains is refered to
+The private/public key pair that an B<EVP_PKEY> contains is referred to
as its "internal key" or "origin" (the reason for "origin" is
explained further down, in L</Export cache for provider operations>),
and it can take one of the following forms: