Selection of content for sharing is described. An indication of desired content to be shared between a first database and a second database is sent from the first database to the second database. The first database receives desired content corresponding to the indication and a relevancy determination corresponding to a threshold fraction of users that tag the desired content to a particular category. A first version of the desired content is identified in the first database. A second version of the desired content is received by the first database from the second database upon an identification, at the second database, of the second version of the desired content.