Today, the pnfRegistrationFields structure of the VES pnfRegistration message contains two parameters:

• oamV4IpAddress
• oamV6IpAddress

These addresses are currently defined as strings.
pnfRegistrationFields.oamV4IpAddress using format "ipv4"
pnfRegistrationFields.oamV6IpAddress using format "ipv6"

This is to avoid issues in controller executions, where improper format of parameters might cause controller calls to fail.

It would make sense to define a restriction on these strings, that they shall match the IPv4 and IPv6 address formats respectively, which is possible in JSON schema.
This task covers an update to ONAP/Honolulu VES Spec, as well as CommonEventFormat JSON schema.