Methods and systems for generating supplemental content are disclosed. A supplemental content selector inputs a primary article and, based on supplemental content logic that governs an examination of content metadata associated with individual elements of the primary article, outputs a supplemental article. The supplemental content logic may also include a preference of a user or a system capability of a system of the user. The supplemental content selector can be used as part of a portal generation system in which space in a portal page is reserved for the supplemental article. In this way, the user of the portal generation system will be provided a portal page that is likely to reflect the interests of the user.