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A ContentBlock is contained in a structured page that uses a ContentTemplate..
A ContentBlock is often a <div> in HTML and XML.
Since a ContentBlock may in turn use a ContentTemplate, there can be an infinite recursion of containers.
Blocks are sometimes called boxes or slots or a Portlet, when they may include a mini application (an applet or Flash).
When a ContentBlock contains a single piece of elementary content (a simple link, text, an image, audio, video, a piece of metadata like author, title, etc.), we call it a ContentElement.
The ContentElement, sometimes called MicroContent, encourages ReUse.
RT - ContentTemplate, ContentElement, PageArchitecture?
CmsGlossary index page.