Module

Property	Description
mod	Module is the wrapper for every container object.
hd	The module header generally contains a heading, but may also contain buttons, links, tabs, etc. Header provides basic structure and can be extended via skin classes. A module can have 0-1 headers.
bd	The body is the main open editable region of the module. It is an obligatory region! A module can have 1-n bodies.
ft	The module footer is optional. It contain content that is relevant to the body content of the module (e.g. The buttons of a pop-up, etc.)

HTML:

<div class="mod">
  <div class="hd">head</div>
  <div class="bd">body</div>
  <div class="ft">body</div>
</div>

Ref: Based on the OOCSS Standard Module Format.