Patent attributes
Systems, methods and program products for classifying text. A system classifies text into first subject matter categories. The system identifies one or more second subject matter categories in a collection of second subject matter categories, each of the second categories is a hierarchical classification of a collection of confirmed valid search results for queries, in which at least one query for each identified second category includes a term in the text. The system filters the identified categories by excluding identified categories whose ancestors are not among the first categories. The system selects categories from the filtered categories based on one or more thresholds in which a threshold specifies a degree of relatedness between a selected category and the text. The selected categories are a sufficient basis for recommending content to a user, the content being associated with one or more of the selected categories.
