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).
A state of being, an external or environmental factor or a treatment observed or administered prior to or concurrent with an investigative procedure such as an assessment of a morphological or physiological state or property in a single individual or sample or in a group of individuals or samples, especially a state, factor or treatment which has the potential to influence the outcome of such an assessment.