COMPLEMENTARY MATERIAL
Although the material in the core is likely to remain fairly constant, complementary material is likely to be more dynamic. Complementary material may take the form of books or web-based material and may be sourced from the wider industry, rather than from The Cabinet Office/The Stationery Office (TSO).
Examples of such material are glossary of terms, process models, process templates, role descriptions, case studies, targeted overviews and study aids for passing examinations. These will typically be officially commissioned and published by TSO.
Other publications that focus on specific market sectors, techniques or technologies are more likely to be produced by organisations such as itSMF or by the vendor community.