A device may obtain text to be categorized, and may determine rules for categorizing portions of the text. A rule may specify text patterns to be used to categorize the portions of the text into a category, and may specify a relationship, between at least two text patterns, to be used to categorize the portions of the text into the category. The device may determine that the text patterns and the relationship between the at least two text patterns exist in a text portion. The device may categorize the text portion into the category based on determining that the text patterns and the relationship between the at least two text patterns exist in the text portion. The device may provide an indication of an association between the text portion and the category based on categorizing the text portion into the category.