The fourth challenge is one of the most commonly cited problems with current CMSes: the degree to which content, presentation, context, and behavior are tied together. Per-device differentiation makes things even more convoluted.
For clarity, let me quickly define each of these:
- Content: any text, images, video, decoration, or user-consumable elements that contribute to comprehension. Basically, the elements of the communicated message.
- Presentation: the spatial and temporal arrangement of elements of content and any wrapper elements required by the delivery medium.
- Context: the specific situation for and to which content is being delivered. This relates to many details, including device, channel, user needs, behavior, previous ...