Name	Description
Biochemical Composition	Fractionation by organic molecule groups (e.g. carbohydrates, lignin etc.). This can be done in defferent levels of detail. Sum parameters for aggregation can be applied.
Chemical Elements	Chemical elemets refer to the periodic table. Several fractionation methods exist, such as chromatography or gravimetry.
Macro Components	Macro components are other materials that comprise a new material as mixture. Typically, the macro components can be sorted visually by hand.
Organic/Inorganic	This group is used to fractionate materials into organic and inorganic (i.e. ash) parts.
Solids/Water	The ratio of total solids and water that is determined by evaporating all water from and fresh matter sample.
Total Material	The total material group consists of 100% fresh matter by default. It is a utility group to have a basis of all other compositions to start from.