An intellectual meta-level framework or structure within which knowledge can be ordered, ranked and categorised. Data taken at the base or apex of the structure as raw input, is processed to produce information which is then refined to produce knowledge for use throughout an organisation. This structure is in stark contrast to the structure of the relationships between knowledge islands. It is also well beyond the fixed pyramid structure of 1950s organisations. As an analogy, contemporary commentators often favour knowledge hierarchies which are tree-like structures.