Tags

You can create a user tag on a zone by using resourceType=ZoneVO. For example,
CreateUserTag resourceType=ZoneVO resourceUuid=0cd1ef8c9b9e0ba82e0cc9cc17226a26 tag=privateZone

System Tags

Reserved Capacity

Tag Description Example Starting Version
host::reservedMemory::{capacity} See Host Capacity Reservation. host::reservedMemory::1G 0.6