Sub-filters in the log filter module. A sub-filter can be one of the following types: - severity - event number - regular expression Each sub-filter entry consists of: - sequence number - matching criteria (severity or event number or regular expression) - action for the match. A default sub-filter with a sequence number of 99 is always created in the sub-filters table and has '.*' as the matching criteria. Matching criteria and action can be modified for all sub-filters except for the default sub-filter which only supports modification of action. To change the sequence number of sub-filter it should be deleted and recreated with a new sequence number. Multiple sub-filters can be added to the filter module, current limit is 20. Sub-filters in the filter module can be same or different types. Entries in this table are associated with parent entries in 'hpicfBasicLogFiltersTable'. When parent entry in the 'hpicfBasicLogFiltersTable' is created or deleted the corresponding entries in this table will be also created or deleted.