An indexer should position the users within the domain. The indexer analyzes the users’ roles in the domain, how and where they fit into the domain, and establishes their needs and special interests within the domain. This analysis provides the indexer with knowledge about users in the context of the domain. The indexer asks where the users fit into the larger domain to identify special topics that are of potential interest to the users, or if there is a specific bias in which the users are interested, or if there is a particular level of specificity that the users need. The indexer needs this information to identify the specific subject matter of the document that might interest or be useful to the users. The indexer needs to place the users within the domain to fully understand the potential uses of a document. Usefulness and relevance to the users extend the subject matter of the document; the indexer needs to identify not only the document’s subject matter but also how the document will be used.