1. A computer readable medium having instructions encoded thereon that, when executed by one or more processors, cause a digital content classification process to be carried out, the process comprising: defining an initial association that exists between (a) one or more tags that represent a digital content segment and (b) a subject matter categorization; providing, to a user, the digital content segment and the subject matter categorization; receiving, from the user, a modified subject matter categorization; and modifying the initial association to produce a modified association that exists between (a) the one or more tags and (b) the modified subject matter categorization.