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

 service-name

    Specifies a LAT service name. By default, a service name is the
    name of the local node you defined with the SET NODE command.

    The service name can be from 1 to 16 ASCII characters in length.
    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 (_)