A guide is composed of one or more pages that are each made up of content boxes which contain content items such as textboxes, images, or assets like link assets, database assets, or books from the catalog, among others.
Here is the Finance guide.
This is the Introduction page of the of the Finance guide.
Here you can see the individual content boxes that make up the Introduction page of the Finance guide.
The information within a content box is called a content item which could be a number of things from textboxes, images, or assets.
