Library /sys$common/syshlp/latcp$help.hlb SET, NODE, Parameter  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 node-name

    Specifies a node name for your local node. By default, the node
    name is the translation of SYS$NODE. A LAT node name should be
    the same as the DECnet node name. If the node is not running
    DECnet but will be in the future, Digital recommends that you
    define SYS$NODE and use it for both DECnet and LAT node names.

    A LAT node name can be from 1 to 16 ASCII characters. The
    characters allowed are as follows:

    o  Alphanumeric characters: A-Z, a-z, 0-9

    o  A subset of the international character set: ASCII codes 192-
       253

    o  Punctuation characters: dollar sign ($), hyphen (-), period
       (.), and underscore (_)