VMS Help System Services, $PERSONA QUERY (Alpha Only), Arguments  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 persona

    OpenVMS usage:persona
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Address of a longword into which the persona identification
    handle is written.

    Two special values for persona are also permitted: 0, which means
    use the current persona, and -1, which means use the process'
    natural persona.

 itmlst

    OpenVMS usage:item_list_3
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Attributes describing which information about the persona is to
    be returned. The itmlst argument is the address of a list of item
    descriptors, each of which describes an item of information or an
    item list processing directive. The list of item descriptors is
    terminated by a longword value of 0.

    Refer to the OpenVMS System Services Reference Manual to view the
    item code diagram and descriptor fields table.