/sys$common/syshlp/helplib.hlb PURGE, Parameter  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 filespec[,...]

    Specifies one or more files to be purged. If you specify more
    than one file, separate the file specifications with either
    commas (,)  or plus signs (+). The asterisk (*)  and the percent
    sign (%)  wildcard characters are allowed in the directory, file
    name, and file type fields; however, no version number can be
    specified. As a default, the PURGE command purges all files
    in the current directory. There are no file name or file type
    defaults with the PURGE command.