What conditions can rules use?

A condition, set under If, checks one part of the article: the title, the content, both, the author, the URL, the detected language, the feed's RSS categories, mentions, or whether the article has attachments, pictures or video. A text condition pairs the field with a match type such as contains, is or matches regular expression, and several conditions combine with And or Or.

The fields

+ Add condition adds a row that starts as Title or content contains. The field menu offers Title or content, Title, Content, Author, URL, URL (without domain), Has attachments, Contains pictures, Contains video, Doesn't contain pictures, Doesn't contain video, List of RSS categories, Detected language and List of mentions. URL checks the article's full address and URL (without domain) only its path. Detected language offers a list of languages with is and isn't, List of RSS categories compares whole category names, ignoring case, and List of mentions lets you search for a mention and matches its other spellings too. Can I use mentions in rules and filters? has the details.

The match types

The match types are contains, doesn't contain, is, isn't, begins with, ends with, matches regular expression and doesn't match regular expression. contains and doesn't contain ignore letter case and find the text anywhere, also inside longer words. Select Whole words only, next to + Add condition, and "launch" no longer matches "launcher". is, isn't, begins with and ends with compare the exact text, letter case included. A regular expression goes between forward slashes, like /[Bb][Bb][Cc]/i, and matches case unless you add i. A comma is searched as a comma, so for several terms add one condition per term and join them with Or.

Combine conditions

1. Under If, click + Add condition.
2. Pick the field, then the match type, then type the text, or pick a language or a mention.
3. Repeat for more conditions. The second row gets a menu with And, so every condition must match, or Or, so one is enough.

A rule with no conditions matches every article, and a rule that matches more than 1,000 articles in an hour is switched off automatically with an email to you, so check a broad rule with Run rule first. Rules are a Pro feature. What are rules? explains their other parts, and Why is my rule not triggering? covers conditions that match less than you expect.