"Rhizome is a Wiki-like content management and delivery system that exposes the entire site -- content, structure, and metadata as editable RDF. This means that instead of just creating a site with URLs that correspond to a page of HTML, with Rhizome you can create URLs that represent just about anything, such as:

• structural components of content (such as a bullet point or a definition).
• abstract entities that can be presented in different ways depending on the context.
• relationships between entities or content, such as annotations or categories."