The style sheets can specify how a document is to be presented on different media: on the screen, on paper, speech synthesiser, etc. You can specify that some of the features of your CSS stylesheet should be taken into account only in the <oXygen/> Author and ignored in the rest. This can be accomplished by using the media type oxygen.
For instance using the following CSS:
b{ font-weight:bold; display:inline; } @media oxygen{ b{ text-decoration:underline; } }
would make a text bold if the document was opened in a web browser who does not
recognize @media oxygen
and bold and underlined in <oXygen/> Author.
You can use this media type to group specific <oXygen/> CSS features and also to hide them when opening the documents with other viewers.