Filters can be used in several places, either in a Filter Stage to directly filter items in feeds, or as conditions for a Conditional Stage to control whether or not another pipeline stage is applied to an item.
Filters
A filter is a collection of Rules along with information about how they should collectively apply to an item.
mode
Either accept or reject. Accepting rules will allow any items that match the filter whereas rejecting rules will block any items that match.
score
Items with a score greater than or equal to the filter score are considered to match the filter.
rules
The array of rules, each of which will be checked against the RSS item.
Rules
Each rule has several pieces of data:
mode
Either contains_string, which checks if the property contains the string in the param field or matches_regex, which checks if the property matches the regular expression in the param field.
property
Which property of the RSS item the rule will check. One of url, title, or author.
param
The parameter of the rule. Usage depends on the rule's mode.