MMIR provides an overview over methods employed in the areas of information retrieval. Methods of one area are adapted and employed on other types of media. Multimedia content is merged before the classification is performed. MMIR methods are, therefore, usually reused from other areas such as:   The International Journal of Multimedia Information Retrieval documents the development of MMIR as a research discipline that is independent of these areas. See also "Handbook of Multimedia Information Retrieval" for a complete overview over this research discipline.