The subject matter of the document is closely tied to the domain in which the document will be used. The indexer, therefore, needs a substantial understanding about the nature of the domain, including its history, schools of thought, paradigms, research fronts, activities, goals, and objectives, to understand the roles a particular document will play in the domain. The indexer can gain this knowledge by studying the activities and discourse of the domain. Hjorland (2002) presents a number of approaches that might be taken in the analysis of the domain. The main concern is that the indexer identifies the domain’s overall goals and purposes, its historical development, and its current research traditions. The ultimate goal of this analysis is to gain an understanding of the domain that enables the indexer to position an argument within the domain.