The SimpleTextAttributes class provides display contants to allow displaying text in a consistant way. This includes style (bold, italic, etc.), color, and size. Attributes can be a utility attribute including only one style rule or helper attributes that combine several styles together if a component requires several to be applied.
NLS Contexts provide annotations to enforce some wording and grammar style guides (FIXME not sure if this is exactly right, but it's how I understand it)