{
{  MEMBER_ENTRY_LIST   (MEL)
{
{  PURPOSE:
{    The member entry list is a sub list of the active set table.
{    Maintained in it are all members (NOT including the master!)
{    in the set.
{  WHEN ACCESSED:
{    All accessing is done by the set manager.
{    MODIFIED:
{    -  When volumes are added to or removed from sets.
{    -  When members become active or inactive.
{    READ:
{    -  The member list is returned to device management when
{       requested on assigning files to volumes.
{  LAYOUT:
{    The MEL is an adaptable array.
{  PRIMARY KEY:
{    Member recorded vsn.
{  RESIDENCY:
{    A pointer to the MEL is maintained for each set in the AST.
{    The MEL is allocated in the mainframe pageable heap.
{    All reading or writing occurs in ring 1.
{  FIELDS:
{    stt$member_entry_list = array [ * ] of stt$member_entry,
{    stt$member_entry = record
{      case entry_type
{      = stc$valid =
{        member_vsn: Name of the member volume,
{        member_internal_vsn: The unique name of the member.
{        member_dm_packet_storage: This indicates whether the
{              dm_packet for the member has ever been stored.
{        member_volume_activity: This describes if the member is
{              active and the avt_index of it if it is.
{
