One feature of a Basic Constraint when applied to a certificate (CA or end certificate) is that I can specify the maximum number of CAs that are permitted in the chain.
I'm planning on having a 2 tier CA system and setting the basic constraints path=1 on the Root CA, path=0 on the Intermediate CA.
What would happen if there was a policy mapping between my PKI and a second PKI? How would the path length be affected if the two PKIs had different values for "path="?
I'm asking so that I don't prevent interoperability with other CAs.