Addressing 1500 developers and community leaders, CEO Thorsten Heins
previewed additional elements of the BlackBerry 10 user experience, and provided an overview of how RIM is delivering on the company's vision for BlackBerry 10.
The collection
element allows resources to be assembled into logical groups for a variety of potential uses: enabling content that has been split across multiple EPUB Content Documents to be reassembled back into a meaningful unit (e.g., an index split across multiple documents), identifying resources for specialized purposes (e.g.,
preview content), or collecting together resources that present
additional information about the given Rendition.