Library /sys$common/syshlp/pca$help.hlb SHOW, RUN_DESCRIPTION, Parameters  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 run-name

    Specifies a collection run name. The run description for any
    run whose run name matches the run-name parameter is displayed.
    If run-name includes asterisks (*), each asterisk is treated as
    a wildcard character that matches any zero or more characters.
    If run-name is not an alphanumeric name, or if it begins with a
    digit, it must be enclosed in quotation marks.

 run-number

    Specifies a collection run number. The run description for any
    collection run in the specified range is displayed.