What are two predefined address-book entries?

http://www.juniper.net/techpubs/en_US/junos12.1/topics/concept/zone-address-book-understanding.html

Predefined Addresses
You can either create addresses or use any of the following predefined addresses that are available by default:

Any—This address matches any IP address. When this address is used as a source or destination address in a policy configuration, it matches the source and destination address of any packet.
Any-ipv4—This address matches any IPv4 address.
Any-ipv6—This address matches any IPv6 address.