Abstract: Dynamically populatable electronic items are items that can be at least partially populated after creation. Dynamically populatable electronic items may include some static information (e.g., text, images, audio, video, etc.) and one or more dynamic fields, which are configured to be dynamically populated from a source separate from the electronic item. Thus, the content of the dynamic electronic item can change over time as the dynamic fields are populated and/or repopulated.

Abstract: Tools and techniques for creating presentations via dynamic digital content (DDC) tools using a display dependent markup language interface facilitating dynamic content are described. The markup language, “DXyml”, identifies content elements, including dynamic content elements, for display and specifies pixel locations at which to position the content elements on a client device. Pixel locations are selected for particular screen configurations, allowing the presentations to be created in advance of being served to specific types of devices with the particular screen configurations.

Abstract: A digital media item, such as an electronic book (eBook), may include testing content. The testing content may include questions about the content of the digital media item. When is user is viewing the digital media item on an electronic device, such as an eBook reader, the user may be allowed to select whether the testing content is displayed. The user may also be allowed to select a particular mode of testing, such as automatic testing, selective testing, etc. If the user chooses to display the testing content, the user may also be allowed to provide answers to the testing questions.