Specifies the available list of preferred enumerations for identifiers for units of measure UOMIdentifierCode Kilometres per hour kph Miles per hour mph Metres m Yards yd Miles mi Kilometres km Feet and inches Note: To enable this to be coded into a single value the following convention shall be followed. The feet value is encoded as an integer value and the is suffixed by the inches value which is given as a two digit decimal value, where leading zeros are maintained [e.g. .00, .01, .02, .03, .04, .05, .06, .07, .08, .09, .10, .11, .12]. The value .99 shall indicate the no inches value is provided. ftin Tonnes t Kilogrammes kg