The ability to search a magazine/app via a text input field would be a useful addition to DPS. Naturally, the TOC currently provides the user with a method to navigate or drill down within the content - however, the ability to search for a specific term, in my opinion, would improve the user experience.
Whether it is possible to retain the ability to search text on a page if articles have been created using the PDF format - I don't know. When using PDF format, are text elements retained? Or is a flattened image rendered at some point?
Alternatively, or in addition, the search could use the TOC and article properties as a basis for its functionality.
Yes, I like the idea of the viewer framework and interface expanding to include new functionality that doesn't have to be hard-wired into the folio pages. Search is a great example as the viewer app would need to have some sort of consistent format for displaying search results and allowing the user to scroll through them. Likewise, pop-ups for displaying contextual information on folio pages would be greatly appreciated. This kind of approach is where I think Apple's iBooks author shines. You provide assets in the form of text, images, metadata, etc. and the interface sorts and displays them for you.
North America
Europe, Middle East and Africa
Asia Pacific