How does the use of class values for semantics interact with the use of class values for attaching CSS styles?
A. The class attribute takes a space separated set of class names HTML4 reference. Thus both author and microformat defined class names may be used in the same class attribute. In addition, microformat class names provide the author with a consistent set of class names to use for styling. If the author is already using using specific class names, they can continue to do so, and include microformat class names. If the author is already using a class name that happens to also be a microformat class name, then the author may want to consider using contextual CSS class selectors to make sure that avoid any unintentional styling effects. See also: • A Touch Of Class • Class For Meaning Not For Show • Competant Classing, by Eric Meyer for discussion of choosing class names in (X)HTML • Class attributes are about more than styling – Ryan King dispells common misconceptions about the HTML class attribute.
