The emphasis throughout this book has been on providing the crawlers with textual content semantically marked up using HTML. However, the less accessible document types—such as multimedia, content behind forms, and scanned historical documents—are being integrated into the search engine results pages (SERPs) more and more, as search algorithms evolve in the ways that the data is collected, parsed, and interpreted. Greater demand, availability, and usage also fuel the trend.
Perhaps the bigger problem with Flash is the fact that it is inherently nontextual. It is essentially like any other video format: there is little incentive within the medium to use lots of text, and ...