Basque word order is largely determined by the notions of focus and topic which are employed to decide how to "package" or structure the propositional content (information) in utterances. Focus is a feature that attaches to a part of a sentence considered to contain the most important information, the "point" of the utterance. Thus in different discourse contexts the same (basic) sentence can take the focus on different parts, giving rise (in a language like Basque) to different grammatical forms. Topic, on the other hand, refers to a part of a sentence that serves to put the information it contains into context, i.e. to establish "what we are talking about". Basque word order involves in a very basic way two rules, the "focus rule" and the "topic rule", as follows: