Meaning of arp flag values

The net/if_arp.h contains the arpreq structure as well it documents the
following values of arp flags :


/* ARP Flag values. */
#define ATF_COM 0x02 /* Completed entry (ha valid).
*/
#define ATF_PERM 0x04 /* Permanent entry. */
#define ATF_PUBL 0x08 /* Publish entry. */
#define ATF_USETRAILERS 0x10 /* Has requested trailers. */
#define ATF_NETMASK 0x20 /* Want to use a netmask (only
for proxy entries). */
#define ATF_DONTPUB 0x40 /* Don't answer this addresses.
*/
#define ATF_MAGIC 0x80 /* Automatically added entry.
*/



ATF_PERM is a static ARP entry and ATF_COM means a compled entry.
What does a published arp entry mean(ATF_PUBL) ?Please tell more about
the entries ATF_PUBL to ATF_MAGIC .