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 method which assesses the amount, proportions or properties of sodium in urine, the fluid waste product excreted by the kidneys. Sodium, the chemical element with atomic number 11 that in its ionic form has lost one electron, forming a cation with a charge of +1, is the chief cation of extracellular body fluids.