return "author";
return "sort_author";
    public static String getValueColumn(BrowseScope scope)    {        int browseType = scope.getBrowseType();        if (browseType == Browse.AUTHORS_BROWSE)            return "author";        if (browseType == Browse.ITEMS_BY_AUTHOR_BROWSE)            return "author";        if (browseType == Browse.ITEMS_BY_DATE_BROWSE)            return "date_issued";        // Note that we use the normalized form of the title        if (browseType == Browse.ITEMS_BY_TITLE_BROWSE)            return "sort_title";        throw new IllegalArgumentException("Unknown browse type: " + browseType);    }