We are using the IPv4/IPv6 addresses and prefixes a lot. The build-in YAMALE ip validator (for example, ip(version=4)) accepts both address (for example 10.0.0.1) and prefix (10.0.0.0/24). However in most cases we want to validate either address or prefix. The idea is to create custom validator for ip_address and ip_prefix so for example:

• in prefix-list we can validate the prefix (e.g. 10.0.0.0/24 has both address and / subnet mask)
• in logging/tacacs server ip we can validate the address (e.g. 10.0.0.0 has IP, but doesn't have subnet mask).