The Clinical Measurement Ontology (CMO), Measurement Methods Ontology (MMO), and Experimental Condition Ontology (XCO) are currently being developed at the Rat Genome Database. For more information about these vocabularies please see Shimoyama et al. Three ontologies to define phenotype measurement data. Front Genet. 2012;3:87. Epub 2012 May 28 or contact us (http://rgd.mcw.edu/contact/index.shtml).
This is a solid diet in which the amount of butter is maintained at a specified level. Butter is a soft yellowish or whitish emulsion of milk fat, water and air, churned from milk or cream and processed for use in cooking and as a food.