Commodity Code

europium

http://resource.geosciml.org/classifier/cgi/commodity-code/europium

definition Europium is a chemical element with the symbol Eu and atomic number 63. It is named after the continent Europe. It is a moderately hard, silvery metal which readily oxidizes in air and water. more like this
notation
02.01.03.01.03 more like this
Eu more like this
source http://en.wikipedia.org/wiki/Europium more like this
type
Resource
Concept
broader hree
narrower europium
in scheme commodity code
is primary topic of europium