id

    OpenVMS usage:rights_id
    type:         longword (unsigned)
    access:       read only
    mechanism:    by value
    Binary value of target identifier whose holder is deleted when
    $REM_HOLDER completes execution. The id argument is a longword
    containing the identifier value.

 holder

    OpenVMS usage:rights_holder
    type:         quadword (unsigned)
    access:       read only
    mechanism:    by reference
    Identifier of holder being deleted when $REM_HOLDER completes
    execution. The holder argument is the address of a quadword
    containing the UIC identifier of the holder in the first longword
    and the value of 0 in the second longword.