Select the domains to use for DITA 1.3
DITA has a number of “standard” domains, such as the programming domain, the user interface domain, the software domain, and so on. Each of these domains includes a set of elements that are usually used inline--that is, they mark up specific words or phrases within a block of text. (There are some domain elements that are block elements in their own right.) You might not need all of the standard domains. For example, if you are not documenting a computer application, you might not need the user interface or software domains. If you want to prevent authors from using formatting markup with no semantic significance, such as bold (<b>) or italics (<i>), then you don't want to use the highlighting domain.
In these steps, you'll remove the highlighting domain.