VMS Help SCA, SCA Topics, Glossary, wildcards  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Wildcards are used to match more than one name at once. There
    are two wildcards in SCA: the asterisk (*) and percent (%). For
    example, in the name expression A*, the wildcard * will match any
    number of characters, so this would match A, AB, ABC, AXYZ, and
    so forth. The * wildcard matches any number of characters, and %
    wildcard matches just one character. If you do not want SCA to use
    * or % as a wildcard, you use an ampersand (&) to quote it. For
    example, to find the single name *, you would use &*.