Genotype, cultivation and identification data that describe the biological source material used in metabolomics experiments. Description of a particular genotype (for yeast it refers to the wild type). Description of a specific genetic strain. There will be a Strain element for each strain used during the project. A description of the observable struc-ture, function or behaviour of the given biological source A gene mutated in a given strain. Description of a biological sample taken from the source Records the observations of growth progress throughout a number of specified stages A brief description of the observable structure, function or behaviour of the given replicate at the given stage A reference to a biological experiment used to obtain the given sample A reference to a set of experiments used to obtain biological samples of the given source