A knowledge base is a collection of information that can be used to solve problems or answer questions. The term "knowledge base" can refer to either the data within the collection, or the software used to manage and access the data. A knowledge base may also be referred to as a "knowledge repository." A knowledge base typically contains both static content, such as documents and articles, and dynamic content, such as discussion forums and chat rooms. The static content is usually organized into a hierarchy or taxonomy, while the dynamic content is usually organized chronologically.