1. A system for associating keywords with images found on the pages of a source, the system comprising: a first data store that stores text and related text metadata obtained from the source pages; a second data store that stores images and related image metadata obtained from the source pages; and a relevance engine that generates a relevance index based at least in part on the text and related text metadata stored in the first data store and the images and related image metadata stored in the second data store, wherein the relevance index records an association between a keyword from the text of the source and an image from the source, and wherein the association may be used to access the image associated with the keyword in response to a search query including the keyword.