Disclosed are examples of systems, apparatus, methods and computer program products for processing a file to generate a recommendation using a database system. A database can be maintained. The database can store data objects identifying historical keywords for a user and weights associated with the historical keywords. Information identifying a file can be received. The file can be processed to extract file keywords. A query attribute can be generated based on the historical keywords, the file keywords, and the weights. It can be determined that the query attribute conforms to a designated characteristic associated with the user. Data indicating a recommendation of the file can be generated in response to determining that the query attribute conforms to the designated characteristic. The data indicating the recommendation can be provided as at least a portion of a feed item of a feed of a social networking system. The feed can be displayed in a user interface on a display device associated with a user of the social networking system.