Historiography has a number of associated meanings. It can refer to the history of historical learning, its methodology and practices (the history of history). It can also refer to a particular body of historical writing (for example, "medieval historiography during the 1960s" means "medieval history written during the 1960s"). Historiography can also be in use to mean historical theory or the study of past writing and memory. As a meta-level analysis of descriptions of the past, this third conception can relate to the first two in that the analysis usually focuses on the narratives, interpretations, worldview, use of evidence, or method of presentation of other historians.